12z+4=2(5z+7)-18

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Solution for 12z+4=2(5z+7)-18 equation: 



12z+4=2(5z+7)-18

We move all terms to the left:

12z+4-(2(5z+7)-18)=0



We calculate terms in parentheses: -(2(5z+7)-18), so:

2(5z+7)-18

We multiply parentheses

10z+14-18

We add all the numbers together, and all the variables

10z-4

Back to the equation:

-(10z-4)



We get rid of parentheses

12z-10z+4+4=0

We add all the numbers together, and all the variables

2z+8=0

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

2z=-8

z=-8/2

z=-4

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