5a-(7-a)=4a-15

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Solution for 5a-(7-a)=4a-15 equation: 



5a-(7-a)=4a-15

We move all terms to the left:

5a-(7-a)-(4a-15)=0

We add all the numbers together, and all the variables

5a-(-1a+7)-(4a-15)=0

We get rid of parentheses

5a+1a-4a-7+15=0

We add all the numbers together, and all the variables

2a+8=0

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

2a=-8

a=-8/2

a=-4

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