7x-21=2x

Simple and best practice solution for 7x-21=2x 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=2x equation:


Simplifying
7x + -21 = 2x

Reorder the terms:
-21 + 7x = 2x

Solving
-21 + 7x = 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-21 + 7x + -2x = 2x + -2x

Combine like terms: 7x + -2x = 5x
-21 + 5x = 2x + -2x

Combine like terms: 2x + -2x = 0
-21 + 5x = 0

Add '21' to each side of the equation.
-21 + 21 + 5x = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 5x = 0 + 21
5x = 0 + 21

Combine like terms: 0 + 21 = 21
5x = 21

Divide each side by '5'.
x = 4.2

Simplifying
x = 4.2

See similar equations:

| 27=45-3b | | 0.15x+0.2y=12 | | 1.95(6.2-3x)-3x-4.81=18.46 | | 0.15x+0.2y=12 | | 1.95(6.2-3x)-3x-4.81=18.46 | | 888x-4x^2=0 | | X+4=3(3x-2) | | -(a+4)-2=8a-6 | | -x-4y=16 | | -(7-2x)=2x | | 2y+2x=52 | | 42=-3+3(3n+3) | | 17(t-2)+4t=7(3t+3)-8 | | 15=3(c-2)-3 | | 220+.25m=390 | | (7n-8)-8=7 | | -2(3r+4)+9(2r-11)=0 | | -(j+9)-13j+12= | | 16-5(3t+4)=8(-2+11) | | (x+y+4)(x+y+4)= | | 16-5(3t+4)=8(-2+11) | | 4(u-3)-u=-2(u+6) | | (x+y+4)(x+y+4)= | | 16-5(3t+4)=8(-2+11) | | 16-5(3t+4)=8(-2+11) | | 4(u-3)-u=-2(u+6) | | 5x+5(y+11)+(4y-10)+90=180 | | 5m^2-5=-47 | | 2(4m-7)m=76 | | 8x+4=9x+1 | | 3(12x+33+4x)= | | X/3-X/9=7 |

Equations solver categories