3x-9=7x+12

Simple and best practice solution for 3x-9=7x+12 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 3x-9=7x+12 equation:


Simplifying
3x + -9 = 7x + 12

Reorder the terms:
-9 + 3x = 7x + 12

Reorder the terms:
-9 + 3x = 12 + 7x

Solving
-9 + 3x = 12 + 7x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-7x' to each side of the equation.
-9 + 3x + -7x = 12 + 7x + -7x

Combine like terms: 3x + -7x = -4x
-9 + -4x = 12 + 7x + -7x

Combine like terms: 7x + -7x = 0
-9 + -4x = 12 + 0
-9 + -4x = 12

Add '9' to each side of the equation.
-9 + 9 + -4x = 12 + 9

Combine like terms: -9 + 9 = 0
0 + -4x = 12 + 9
-4x = 12 + 9

Combine like terms: 12 + 9 = 21
-4x = 21

Divide each side by '-4'.
x = -5.25

Simplifying
x = -5.25

See similar equations:

| -6u+2(u+2)=-8 | | (2+v)(2v-5)=0 | | 11x-3=8x+15 | | 2s+5p+8*(30-0.625p-0.25s)=240 | | x^4-2x^3+x-1=0 | | 11x-3=8x+5 | | 8g-3=19 | | 2/3x-1/2y-4/5 | | 2s+5p+8c=240 | | f+30=65 | | (-8v)-8=24 | | 16t^2+9t-157=0 | | 7(r+5)=84 | | 25.6=2x | | -3x-40=-5(x+4) | | 16t^2-138t+78=0 | | (K-10)=12 | | y=-4x-14.5 | | 6/5x^-1/5 | | (-10+x)-9=10 | | 9(w-6)=3w-30 | | 3x^2+6x-2=2x^2+5 | | y-60=48 | | -5(n+3)=-60 | | x^4-6x^3+x^2-6x=0 | | .3x=36 | | 16x-2=15x-36 | | 3.84=u/3 | | .5d-12=24 | | .5-12=24 | | 9=(x+5)2 | | P=Z^3 |

Equations solver categories