7x-21=3x+7

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


Simplifying
7x + -21 = 3x + 7

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

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

Solving
-21 + 7x = 7 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-21 + 7x + -3x = 7 + 3x + -3x

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

Combine like terms: 3x + -3x = 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:

| x+x+x=x+18 | | x^4+4x^3+7x^2+16x+12=0 | | -9c=-18 | | (3x-10)(-5)= | | 2(3x-1)=5x+6 | | 5-9c=-13 | | 2x-8=5x-11 | | Y=hx+g | | x^2-14x+40= | | x^2-5x+4= | | x^2-4x-32= | | x^2+7x-8= | | x^2+10x+9= | | x-50=30 | | x=R | | (4z+5)3= | | 59-2x=7x+23 | | 5x+12=84-3x | | 160-10x=-10x+20 | | 107-6x=30x+15 | | 160-10x=-10x-20 | | 5-10x=80-45x | | 122-5x=22x+23 | | -37-9x=10x+20 | | 4x+8=-48-10x | | 7-7x=187-42x | | 8+4x=38+x | | 3x-1=11x-25 | | 4x+20=13x-61 | | -59-8x=8x+21 | | 89-3x=2x+17 | | 8x-39=2x+3 |

Equations solver categories