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5(-2+a)=-30
We move all terms to the left:
5(-2+a)-(-30)=0
We add all the numbers together, and all the variables
5(a-2)-(-30)=0
We add all the numbers together, and all the variables
5(a-2)+30=0
We multiply parentheses
5a-10+30=0
We add all the numbers together, and all the variables
5a+20=0
We move all terms containing a to the left, all other terms to the right
5a=-20
a=-20/5
a=-4
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