(2a-4)=30

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Solution for (2a-4)=30 equation: 



(2a-4)=30

We move all terms to the left:

(2a-4)-(30)=0

We get rid of parentheses

2a-4-30=0

We add all the numbers together, and all the variables

2a-34=0

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

2a=34

a=34/2

a=17

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