70=-7(3-3z)

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Solution for 70=-7(3-3z) equation: 



70=-7(3-3z)

We move all terms to the left:

70-(-7(3-3z))=0

We add all the numbers together, and all the variables

-(-7(-3z+3))+70=0



We calculate terms in parentheses: -(-7(-3z+3)), so:

-7(-3z+3)

We multiply parentheses

21z-21

Back to the equation:

-(21z-21)



We get rid of parentheses

-21z+21+70=0

We add all the numbers together, and all the variables

-21z+91=0

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

-21z=-91

z=-91/-21

z=4+1/3

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