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-6(3+a)=-48
We move all terms to the left:
-6(3+a)-(-48)=0
We add all the numbers together, and all the variables
-6(a+3)-(-48)=0
We add all the numbers together, and all the variables
-6(a+3)+48=0
We multiply parentheses
-6a-18+48=0
We add all the numbers together, and all the variables
-6a+30=0
We move all terms containing a to the left, all other terms to the right
-6a=-30
a=-30/-6
a=+5
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