7+4(2a+25)=-13

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Solution for 7+4(2a+25)=-13 equation: 



7+4(2a+25)=-13

We move all terms to the left:

7+4(2a+25)-(-13)=0

We add all the numbers together, and all the variables

4(2a+25)+20=0

We multiply parentheses

8a+100+20=0

We add all the numbers together, and all the variables

8a+120=0

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

8a=-120

a=-120/8

a=-15

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