3x+13=7x+21

Simple and best practice solution for 3x+13=7x+21 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+13=7x+21 equation:


Simplifying
3x + 13 = 7x + 21

Reorder the terms:
13 + 3x = 7x + 21

Reorder the terms:
13 + 3x = 21 + 7x

Solving
13 + 3x = 21 + 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.
13 + 3x + -7x = 21 + 7x + -7x

Combine like terms: 3x + -7x = -4x
13 + -4x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
13 + -4x = 21 + 0
13 + -4x = 21

Add '-13' to each side of the equation.
13 + -13 + -4x = 21 + -13

Combine like terms: 13 + -13 = 0
0 + -4x = 21 + -13
-4x = 21 + -13

Combine like terms: 21 + -13 = 8
-4x = 8

Divide each side by '-4'.
x = -2

Simplifying
x = -2

See similar equations:

| 5f+6=8(f+12) | | 12x=9.2 | | 3p+19=-12 | | -13+15u=17u+17 | | x=-y+30 | | 8+3d=2d+1 | | 5x^3(6x^2+8x-17)=0 | | 6x^2-4x+29=0 | | -v+10=4v | | (-x^2+6x-8)(-x^2+6x-8)= | | 14x^2-224=0 | | -6j+10=-4j-10 | | n^2+16n-17=0 | | 4w+1+w+3w-7= | | 10+10-6p=-8-10p | | -6t+10=-4t | | 3(r+3)=7r+49 | | x=300+0.90x | | -6w+6=-6-8w | | 10f-3=9f+3 | | 8-10h=-9h | | -9g=-1-8g | | 5x-4(2x+2)=-17 | | 6=3x^2+5x | | 6m+30-2m+11-m= | | 11c-10c+2c=18 | | 4(x+1)+3x=10 | | -14a+15a-8a+2=16 | | 4x^2-384=0 | | 3x+-2+4=x+-6 | | -4d-10=6 | | 11+5d-d-4-7= |

Equations solver categories