4a+16-(a-4)=-25

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Solution for 4a+16-(a-4)=-25 equation: 



4a+16-(a-4)=-25

We move all terms to the left:

4a+16-(a-4)-(-25)=0

We add all the numbers together, and all the variables

4a-(a-4)+41=0

We get rid of parentheses

4a-a+4+41=0

We add all the numbers together, and all the variables

3a+45=0

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

3a=-45

a=-45/3

a=-15

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