3(a+4)+a=90

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Solution for 3(a+4)+a=90 equation: 



3(a+4)+a=90

We move all terms to the left:

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

We add all the numbers together, and all the variables

a+3(a+4)-90=0

We multiply parentheses

a+3a+12-90=0

We add all the numbers together, and all the variables

4a-78=0

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

4a=78

a=78/4

a=19+1/2

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