7(4a-8)=140

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Solution for 7(4a-8)=140 equation: 



7(4a-8)=140

We move all terms to the left:

7(4a-8)-(140)=0

We multiply parentheses

28a-56-140=0

We add all the numbers together, and all the variables

28a-196=0

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

28a=196

a=196/28

a=7

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