x+9=3x-21

Simple and best practice solution for x+9=3x-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 x+9=3x-21 equation: 



x+9=3x-21

We move all terms to the left:

x+9-(3x-21)=0

We get rid of parentheses

x-3x+21+9=0

We add all the numbers together, and all the variables

-2x+30=0

We move all terms containing x to the left, all other terms to the right

-2x=-30

x=-30/-2

x=+15

See similar equations:

| 5(–3x)=4(6–4x) | | 3*(6x)=–180 | | 6(x+16)+7=145 | | 0.6z-8=-1 | | 4a-3=-8+4a | | 4z-8=-1 | | P=2.8s+73 | | 7-r=-r-r | | 8^-5x-3=32^-2 | | -100+8y=20 | | 159=127x+46x | | x/9-6=6 | | x-2.9=9.64 | | 6(x+8)+7=19 | | 6=-10-p5 | | 3(6x)=–180 | | 3(x+8)-14=37 | | 2(3+6x)=-3(x-2) | | 5(6x+1)=3(-8+x)+3 | | 12a2+11a+2=0 | | 7+2n=7+2n | | x-2(-3)=9 | | 17u-8u=36 | | 167=16x+1+6x+12 | | m+-12=17 | | 2.5(3+x)=0 | | x+8=4x+3+243 | | 10=5x-77 | | 164=144x+28x | | -30=-2(v+5) | | 4x-14=x+9 | | 42x+108=2(5x-10) |

Equations solver categories