7(2x+3)=7x-21

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Solution for 7(2x+3)=7x-21 equation: 



7(2x+3)=7x-21

We move all terms to the left:

7(2x+3)-(7x-21)=0

We multiply parentheses

14x-(7x-21)+21=0

We get rid of parentheses

14x-7x+21+21=0

We add all the numbers together, and all the variables

7x+42=0

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

7x=-42

x=-42/7

x=-6

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