① Given that the equation of X, 5x-2a-1 = x and 7x = 3 (a-5 / 3 times x) - 3 have the same solution, then what is the square of (A-1)? (2) if | 3

① Given that the equation of X, 5x-2a-1 = x and 7x = 3 (a-5 / 3 times x) - 3 have the same solution, then what is the square of (A-1)? (2) if | 3

Twenty
3x-2y=1 5x+3y=8 3y-6z=-1
To solve this cubic equation,
3x-2y=1 1
5x+3y=8 2
3y-6z=-1 3
1 * 3 + 2 * 2, 19x = 19, x = 1
Substituting x = 1 into 1, we get: 3-2y = 1, y = 1
Substituting y = 1 into 3, we get 3-6z = - 1, z = 2 / 3
Learning from the sea
Because 3x-2y = 1, x = (2y-1) / 3, because 5x + 3Y = 8, x = (8-3y) / 5
From the above two formulas, we can see that (2y-1) / 3 = (8-3y) / 5, and the solution is y = 29 / 19
Substituting y = 29 / 19 into 3x-2y = 1 gives x = 77 / 57
Substituting y = 29 / 19 into 3y-6z = - 1 yields 53 / 57
How to solve the equation 3x + 1 / 5 + 200% x = 25.2?
3X+0.2+2X=25.2
X=5
200%=2，1/5=0.2
The calculation formula is as follows
3x+0.2+2x=25.2
5X=25.2-0.2
5X=25
X=5
Given that the value of x ^ 2 + 4x-4 is 0, find the value of 3x ^ 2 + 12x-5
x^2+4x-4=0
x^2+4x=4
3x^2+12x-5
=3(x^2+4x)-5
=3*4-5
=7
Known: X & # 178; + 4x-4 = 0
x²+4x=4
Then: 3x & # 178; + 12x-5
=3（x²+4x）-5
=3x4-5
=7
We know that x ^ 2 + 4x-4 = 0
Then shift x ^ 2 + 4x = 4
Multiply both sides by 3 at the same time
be
3x^2+12x=12
So the final result is 7
Thank you
Solve the equation x + 1 / 2 = 3x-1 / 2 x / 5 = 30 + X / 6
In the construction of a highway, it is necessary to dig a 1200m long tunnel. The two engineering teams of Party A and Party B excavate from both ends at the same time. Party A excavates 2m every day and Party B excavates 3M every day. How many days can we get through the tunnel?
The first equation x = 0.5, the second x = 30 1200 / (2 + 3) = 240 days
It will take X days
2x+3x=1200
x=240
A: it will take 240 days.
1200 / (2 + 3) = 240 days
It will take X days
2x+3x=1200
x=240
Set X days
1200=（2+3）X
X=240
If x ^ 2-4x-4 = 0, then the value of 3x ^ 2 + 12x-5 is______ .
Why? It's a process!!
The one downstairs can see clearly. I know how you made it, but it's definitely not 7, because I wanted to say that at first, but later I found it was not
X = 2 radical 8
If the solution of equation 6x + 30 = 22 is the same as that of equation 3x + 5 = 11, what is the value of a,
6x+30=22
6x=-8
x= -4/3
A = - 12 or 10 because there is no mention of subtracting a or adding a
What if there's no a
I'm not interested in this kind of problem. I won't give you 100 points. If you don't want to solve the equation of one variable, don't go to school.
2/1x-28=50 4x+3/2=4/5 x-7/2x=28/15 3x-1.2=3.6 0.9x+1.3x=5.28
2/1x-28=50 2/1x=50+28=78x=78*2x=1564x+3/2=4/5 4x=4/5 -3/24x=-7/10x=-7/10/4x=-7/40x-7/2x=28/15 -5/2x=28/15 x=-28/15 *2/5x=56/753x-1.2=3.6 3x=3.6+1.23x=4.8x=4.8/3x=1.60.9x+1.3x=5.282.2x=5.28x=5.28/2.2x=...
Given that the solution of the equation 3x-2m = 4 about X is x = - m, what is the value of M?
Substituting x = - m, we get the following result:
3*(-m)-2m=4
-5m=4
m=-0.8
m=-0.5
－0.8
Take x = - m into the equation
-5m=4
m=-4/5
Well, we should bring x = - m to - 3m-2m = 4 - 5m = 4 M = - 4 / 5
4X + 3x = 24, what is x
24/7 GG