3(7-x)=30+4x-9

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Solution for 3(7-x)=30+4x-9 equation: 



3(7-x)=30+4x-9

We move all terms to the left:

3(7-x)-(30+4x-9)=0

We add all the numbers together, and all the variables

3(-1x+7)-(4x+21)=0

We multiply parentheses

-3x-(4x+21)+21=0

We get rid of parentheses

-3x-4x-21+21=0

We add all the numbers together, and all the variables

-7x=0

x=0/-7

x=0

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