15a-75=-7-8

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Solution for 15a-75=-7-8 equation: 



15a-75=-7-8

We move all terms to the left:

15a-75-(-7-8)=0

We add all the numbers together, and all the variables

15a-75-(-15)=0

We add all the numbers together, and all the variables

15a-60=0

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

15a=60

a=60/15

a=4

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