3(z+5)=21

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Solution for 3(z+5)=21 equation: 



3(z+5)=21

We move all terms to the left:

3(z+5)-(21)=0

We multiply parentheses

3z+15-21=0

We add all the numbers together, and all the variables

3z-6=0

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

3z=6

z=6/3

z=2

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