0.4(3z+6)+20.4=0.7(3z-6)

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Solution for 0.4(3z+6)+20.4=0.7(3z-6) equation: 



0.4(3z+6)+20.4=0.7(3z-6)

We move all terms to the left:

0.4(3z+6)+20.4-(0.7(3z-6))=0

We multiply parentheses

1.2z-(0.7(3z-6))+2.4+20.4=0



We calculate terms in parentheses: -(0.7(3z-6)), so:

0.7(3z-6)

We multiply parentheses

2.1z-4.2

Back to the equation:

-(2.1z-4.2)



We add all the numbers together, and all the variables

1.2z-(2.1z-4.2)+22.8=0

We get rid of parentheses

1.2z-2.1z+4.2+22.8=0

We add all the numbers together, and all the variables

-0.9z+27=0

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

-0.9z=-27

z=-27/-0.9

z=+30

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