3x-21=7x+7

Simple and best practice solution for 3x-21=7x+7 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-21=7x+7 equation:


Simplifying
3x + -21 = 7x + 7

Reorder the terms:
-21 + 3x = 7x + 7

Reorder the terms:
-21 + 3x = 7 + 7x

Solving
-21 + 3x = 7 + 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.
-21 + 3x + -7x = 7 + 7x + -7x

Combine like terms: 3x + -7x = -4x
-21 + -4x = 7 + 7x + -7x

Combine like terms: 7x + -7x = 0
-21 + -4x = 7 + 0
-21 + -4x = 7

Add '21' to each side of the equation.
-21 + 21 + -4x = 7 + 21

Combine like terms: -21 + 21 = 0
0 + -4x = 7 + 21
-4x = 7 + 21

Combine like terms: 7 + 21 = 28
-4x = 28

Divide each side by '-4'.
x = -7

Simplifying
x = -7

See similar equations:

| 3x-1=-(x+5) | | 3x+9=6x-10 | | -4/5(2)-1=y | | -2(x+8)-5=1 | | 6p-19=29 | | x^2-10=-60 | | 5-3(x+4)=-3 | | 4/x+2+1/x-2=19/x^2-4 | | x-3(2x+3)=31 | | v=(3.14)(9)(7) | | -4/5(-1)-1=y | | 6/11=12/x | | 9x^2-16=121 | | 3(x-2)=5-2(x-3) | | -2x+y=-17 | | (2/3)*0=4+y | | -4/5(-2)-1=y | | 6.9(1x+9)=130.41 | | 9x-16=121 | | 2y+3=4y-1/5 | | 1/4(m+12)+3/4m=-1 | | -9/4+3/2x=0 | | 100000*565663224688=9 | | 100000*565663224688=6 | | 7x^2+5=257 | | 14z+52=360 | | (2/3)0=4+y | | f(x)=9x+7 | | (2/3)x=4+0 | | 7/2+3x=59/14 | | 2/3(c-1)=1/2(4c)+1 | | 0=-3n+6-12n |

Equations solver categories