If (a + 3) &# 178; and B-1 are opposite numbers, and the solution of the equation a + x-4 - 3Y = &# 189; X + B is x = - 1, find the value of 2Y & # 178; - 3

If (a + 3) &# 178; and B-1 are opposite numbers, and the solution of the equation a + x-4 - 3Y = &# 189; X + B is x = - 1, find the value of 2Y & # 178; - 3

（a+3）²+｜b-1｜=0
a+3=0,b-1=0
a=-3,b=1
（-3-1）/4-3y=1/2×（-1）+1
-1-3y=1/2
-3y=3/2
y=-1/2.
2Y & # 178; - 3 = 2 × (- 1 / 2) & # 178; - 3 = - 3 and 1 / 2
If we know that x.y is opposite to each other, and 3x-7y = 10, we can find the power of X to the power of 2009 + 500y
From the fact that X and y are opposite to each other, x = - Y
Substituting 3x-7y = 10, x = 1, y = - 1
So, x ^ 2009 + 500y = 1-500 = - 499
x=1 y=-1
Y = - 499 power
If | B-1 | and (a + 3) & # 178; are reciprocal numbers, and X-1 is the solution of the equation a + x-3y = 2x + B of X, find the value of 2Y & # 178; - 3
That Wrong number If | B-1 | and (a + 3) & # 178; are opposite numbers and x = - 1
The absolute values of (a + 3) ^ 2 and B-1 are opposite to each other
∴(a+3)²+|b-1|=0
∴a+3=0 b-1=0
∴a=-3 b=1
The solution of (a + x) / 4-3y = (1 / 2) x + B is x = - 1
∴(-3-1)/4-3y=-1/2+1
-3y=3/2 y=-1/2
∴2y^2-3=2*(-1/2)²-3=-5/2
It is known that: x = - 6, y = 5 and 1 / 2 to find: 7Y's square + (18-13x's second power - 5Y's Square) - 3 / 4 (12-4x's square + 8y's Square)
Xiao Ling wrote the values of X and Y wrong in her calculation. They were x = 6 and y = 51 / 2 respectively. But the result is still correct. Can you explain why?
（thank you )
(Note: reason, not formula)
7Y's square + (18-13x's second power - 5Y's Square) - 3 / 4 (12-4x's square + 8y's Square)
=7y^2+18-13x^2-5y^2-9+3x^2-2y^2
=-10x^2+9
X ^ 2 = 36 is independent of y value
Original = - 360 + 9
=-351
(a + 3) &# 178; is opposite to the absolute value B + 1, and with respect to the solution x = - 1 of the equation a + X / 4-3y = 2 / 1X + B about X, we can find the value of 2Y & # 178; - 8
（a+3)²+▏b+1▏=0
a+3=0 a=-3
b+1=0 b=-1
Substituting a = - 3, B = - 1, x = - 1 into (a + x) / 4-3y = (x + b) / 2
(-3-1)/4-3y=(-1-1)/2 3y=0 y=0
∴2y²-8=2×0-8=-8
Given that X and y are opposite numbers and 3x-7y = 10, find the power of X to the power of 2013 + 500y
x. Y is opposite to each other, that is, x + y = 0
Simultaneous solution of equations with equation 3x-7y = 10
The solution is x = 1, y = - 1
therefore
The power of 2013 of X + 500y = 1 is - 500 = 1-500 = - 499
Judge whether the points a (1, - 2), B (2, - 3), C (3,0) are on the curve of the equation x & # 178; - XY + 2Y + 1 = 0
solution
Substituting a (1, - 2) into
x²-xy+2y+1
=1+2-4+1
=0
So in the equation
Similarly, substituting
x²-xy+2y+1
=4+6-6+1
≠0
So it's not in the equation
x²-xy+2y+1
=9+1
≠0
So it's not in the equation
Take three points directly into the equation
：x²-xy+2y+1
If it's 0, it's not
-The 2m-5th power of 3x multiplied by the 4th power of Y - the 2nth power of 0.7y multiplied by the 4-m power of X is equal to the 4-m power of a multiplied by X multiplied by the 4th power of Y. I need a process. Thank you
-The 2m-5 power of 3x multiplied by the 4th power of Y - the 2n power of 0.7y multiplied by the 4-m power of X is equal to a multiplied by the 4-m power of X multiplied by the 4th power of Y
Mathematics problems in grade one of junior high school
Finding the value of N, a, M
This is a disguised problem of merging similar items
2m-5=4-m 2n=4
m=3 n=2 a=-3.7
Given that a and B are the two roots of the equation x-4x + M = 0, B and C are the two roots of the equation x-8x + 5m = 0, then the value of M is?
From the title, we can know that b-4b + M = 0 and b-8b + 5m = 0. The two formulas can be subtracted to B = m and m-3m = 0 to M = 0 or M = 3
Given X / 2 = Y / 3 = Z / 4, find: (3x-4y + 6Z) / (5x + 8y-2z)
Given: X / 2 = Y / 3 = Z / 4, find: (3x-4y + 6Z) / (5x + 8y-2z)
Let X / 2 = Y / 3 = Z / 4 = k, then x = 2K, y = 3k, z = 4K
Substituting: (3x-4y + 6Z) / (5x + 8y-2z) = (6k-12k + 24K) / (10K + 24k-8k) = 18K / 26k = 9 / 13
Let K be used
Let X / 2 = Y / 3 = Z / 4 = K
Then x = 2K, y = 3k, z = 4K, substituting into the original formula
Original formula = (6k-12k + 24K) / (10K + 24k-8k)
=18k/26k
=9/13