15(a+4)=90

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Solution for 15(a+4)=90 equation: 



15(a+4)=90

We move all terms to the left:

15(a+4)-(90)=0

We multiply parentheses

15a+60-90=0

We add all the numbers together, and all the variables

15a-30=0

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

15a=30

a=30/15

a=2

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