8x-21=3(x+3)

Simple and best practice solution for 8x-21=3(x+3) 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 8x-21=3(x+3) equation: 



8x-21=3(x+3)

We move all terms to the left:

8x-21-(3(x+3))=0



We calculate terms in parentheses: -(3(x+3)), so:

3(x+3)

We multiply parentheses

3x+9

Back to the equation:

-(3x+9)



We get rid of parentheses

8x-3x-9-21=0

We add all the numbers together, and all the variables

5x-30=0

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

5x=30

x=30/5

x=6

See similar equations:

| (5x)3=518 | | m-1+2m=2m+5 | | 2v+5v=7 | | 1-5n-8-7n=17 | | n+(-9)=3+15 | | 2a+3=9−3a | | 3s+3s=18 | | -12+1/4x=5 | | 3(1-x)+5(x+2)=7-4x | | 14k−8k=12 | | 10(1+3b)+1=-19 | | x+3+2=-3x+5 | | -7=5-r | | 216+y=287 | | 4(x+3)+5x=3x-6+4x | | 24+4x=7(6x-7) | | 6x+175°=3x+127° | | 7-1+3n+7n=8n+8 | | 5n-3n-1=13 | | 5(x+4)-3=2x+13+x | | 2b+15=15 | | (13x+12)=x | | 3p+7=–4p+49 | | 4f+20=7f+6 | | 2x+10+3x-40=90 | | y–16=7 | | -2(7x+9)+7(x-1)=3 | | (8x+7)+(4x+14)=180 | | 3-16w=15 | | 30-42w+12=-54 | | n+6-7=1+2n | | a÷5=40 |

Equations solver categories