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If 3x + 2Y = 0, then the value of the algebraic expression 2x + 3Y / 2x-3y is
3x+2y=0
That is, y = - 3x / 2
So,
(2x+3y) / (2x-3y)
=(2x - 9x/2) / (2x + 9x/2)
=(-5/2) / (13/2)
=-5/13
Do you understand? Welcome to ask
If 2x + 3Y = 2004, then the algebraic formula 2 (3x-2y) - (X-Y) + (- x + 9y) =
2 (3x-2y) - (X-Y) + (- x + 9y) = 4x + 6y = 2 (2x + 3Y) = 2004 * 2 = 4008
If 3x + 2Y = 0 (XY ≠ 0), then the algebraic formula 2x + 3Y / 2x-3y= If 3x + 2Y = 0, then the algebraic expression 2x + 3Y / 2x-3y =? (XY is not equal to 0)
If 3x + 2Y = 0, then the algebraic formula 2x + 3Y / 2x-3y =? (XY is not equal to 0) ---- it is easy to calculate with substitution method. 3x + 2Y = 03x = - 2Y can be set as 3x = - 2Y = 6K, then x = 2K, y = - 3K is substituted into 2x + 3Y / 2x-3y, and 2x + 3Y / 2x-3y = (4k-9k) / (4K + 9K
When x = 5, y = 3, find the algebraic expression 2x-3y / 3x-2y
When x = 5, y = 3,
The original formula = [2 × 5-3 × 3] / [3 × 5-2 × 3]
=[10－9]/[15－6]
=1/9
If 2x + 3Y = 2010, then the algebraic formula 2 (3x-2y) - (X-Y) + (- x + 9y) = ()
2（3x-2y）-（x-y）+（-x+9y）
=6x-4y-x+y-x+9y
=4x+6y
=2(2x+3y)
=2*2010
=4020
If the value of the algebraic expression 3x-8y is 2010, then the value of the algebraic expression 2 (x + 6y) - (X-Y) - 4-4y is_____
(x + 6y) - (X-Y) - 4-4y = 2x + 12y-x + y-4-4y = 2x + 12y-x + y-4-4y = (2x-x) + (12Y + y-4y) - 4 = x + 9y-4 > (I have searched the Internet for a title, it should be 2 (x + 6y) - 8 (X-Y) - 4-4y, missing a '8' right) so that said, it should be: 2 (x + 6y) - 8 (X-Y) - 4-4y = 2x + 12y-8x + 8y-4-4y = (2x-8x + 8y + 8y-4-4y = (2x-8x-8x + 8y + 8y-4-4y = (2x-8x-8x-8x
Given 3x-y = 1, find the value of the algebraic expression [(x ^ 2 + y ^ 2) - (X-Y) ^ 2 + 2Y (2x-y)] / 4Y
The original formula = (x? + y? - x? + 2xy-y? + 4xy-2y?) / (4Y)
=(6xy-2y²)/4y
=(3x-y)/2
=1/2
If X-2 and - 3x + 8 are opposite numbers to each other, then x=______ .
On the contrary, 3x-8 is reciprocal,
x-2+（-3x+8）=0，
X = 3,
So the answer is: 3
If 10 ^ x = 3,10 ^ y = 2, find the value of the algebraic expression 10 ^ 3x + 4Y
10^3x+4y
=(10^x)^3*(10^y)^4
=3^3*2^4
=27×16
=432
Wish you progress in your study
If 2x + 3Y = 2012, then the algebraic formula 2 (3x-2y) - (X-Y) + (- x + 9y) = (?)
2(3x-2y)-（x-y）+（-x+9y）
=6x-4y-x+y-x+9y
=4x+6y
=2(2x+3y)
=2×2012
=4024
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