3(a+5)=5a+7

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Solution for 3(a+5)=5a+7 equation: 



3(a+5)=5a+7

We move all terms to the left:

3(a+5)-(5a+7)=0

We multiply parentheses

3a-(5a+7)+15=0

We get rid of parentheses

3a-5a-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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