x-21=3x+15

Simple and best practice solution for x-21=3x+15 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 x-21=3x+15 equation:


Simplifying
x + -21 = 3x + 15

Reorder the terms:
-21 + x = 3x + 15

Reorder the terms:
-21 + x = 15 + 3x

Solving
-21 + x = 15 + 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 + x + -3x = 15 + 3x + -3x

Combine like terms: x + -3x = -2x
-21 + -2x = 15 + 3x + -3x

Combine like terms: 3x + -3x = 0
-21 + -2x = 15 + 0
-21 + -2x = 15

Add '21' to each side of the equation.
-21 + 21 + -2x = 15 + 21

Combine like terms: -21 + 21 = 0
0 + -2x = 15 + 21
-2x = 15 + 21

Combine like terms: 15 + 21 = 36
-2x = 36

Divide each side by '-2'.
x = -18

Simplifying
x = -18

See similar equations:

| 9x+16=5x-10 | | 3x+19+y=53 | | 328=128q+r | | 11x-50=180 | | 6x-20=6x+20 | | -10x-3x-5*(6x+5)=y | | 9+6x=25+x | | 23x+4y-58=360 | | -17+x=3x+23 | | log(x)=.86 | | -71-4x=3x+83 | | 4(2x-15)=-3(3x-12) | | (5/6)(5/6)=(1/x) | | 10n+19=12n+4 | | m=m | | m=0 | | (3x-1)(x+3)=x(1+6x) | | -93-7x=2x+69 | | 5x+8=2y+2 | | 3x+5-7x-11=7x-11 | | 2p-q=2x | | 17j+20=-20+19j | | x^2+4.5x=-8 | | -8x-5+3x+4=y | | 3x+2(5x)=10 | | -90+x=9x+134 | | 2=k(14) | | -12=3x+x | | -2x+7-6=5(x-6)-0 | | -49-9x=-6x+20 | | −1/4​​a−4=7/4a−3 | | -15k+11k-10=-6k+20 |

Equations solver categories