3(5-x)=6x-21

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Solution for 3(5-x)=6x-21 equation: 



3(5-x)=6x-21

We move all terms to the left:

3(5-x)-(6x-21)=0

We add all the numbers together, and all the variables

3(-1x+5)-(6x-21)=0

We multiply parentheses

-3x-(6x-21)+15=0

We get rid of parentheses

-3x-6x+21+15=0

We add all the numbers together, and all the variables

-9x+36=0

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

-9x=-36

x=-36/-9

x=+4

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