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-2(a+5)-8a=-4(a+1)
We move all terms to the left:
-2(a+5)-8a-(-4(a+1))=0
We add all the numbers together, and all the variables
-8a-2(a+5)-(-4(a+1))=0
We multiply parentheses
-8a-2a-(-4(a+1))-10=0
We calculate terms in parentheses: -(-4(a+1)), so:We add all the numbers together, and all the variables
-4(a+1)
We multiply parentheses
-4a-4
Back to the equation:
-(-4a-4)
-10a-(-4a-4)-10=0
We get rid of parentheses
-10a+4a+4-10=0
We add all the numbers together, and all the variables
-6a-6=0
We move all terms containing a to the left, all other terms to the right
-6a=6
a=6/-6
a=-1
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