7(2a-4)=28

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Solution for 7(2a-4)=28 equation: 



7(2a-4)=28

We move all terms to the left:

7(2a-4)-(28)=0

We multiply parentheses

14a-28-28=0

We add all the numbers together, and all the variables

14a-56=0

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

14a=56

a=56/14

a=4

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