15x-(7x+3)=21

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Solution for 15x-(7x+3)=21 equation: 



15x-(7x+3)=21

We move all terms to the left:

15x-(7x+3)-(21)=0

We get rid of parentheses

15x-7x-3-21=0

We add all the numbers together, and all the variables

8x-24=0

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

8x=24

x=24/8

x=3

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