7(5a+-4)=15+-8

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Solution for 7(5a+-4)=15+-8 equation: 



7(5a+-4)=15+-8

We move all terms to the left:

7(5a+-4)-(15+-8)=0

We add all the numbers together, and all the variables

7(5a-4)-7=0

We multiply parentheses

35a-28-7=0

We add all the numbers together, and all the variables

35a-35=0

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

35a=35

a=35/35

a=1

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