3(x-21)=15

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



3(x-21)=15

We move all terms to the left:

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

We multiply parentheses

3x-63-15=0

We add all the numbers together, and all the variables

3x-78=0

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

3x=78

x=78/3

x=26

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