12=4(z-15)

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Solution for 12=4(z-15) equation: 



12=4(z-15)

We move all terms to the left:

12-(4(z-15))=0



We calculate terms in parentheses: -(4(z-15)), so:

4(z-15)

We multiply parentheses

4z-60

Back to the equation:

-(4z-60)



We get rid of parentheses

-4z+60+12=0

We add all the numbers together, and all the variables

-4z+72=0

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

-4z=-72

z=-72/-4

z=+18

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