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48=(2+a)*8
We move all terms to the left:
48-((2+a)*8)=0
We add all the numbers together, and all the variables
-((a+2)*8)+48=0
We calculate terms in parentheses: -((a+2)*8), so:We get rid of parentheses
(a+2)*8
We multiply parentheses
8a+16
Back to the equation:
-(8a+16)
-8a-16+48=0
We add all the numbers together, and all the variables
-8a+32=0
We move all terms containing a to the left, all other terms to the right
-8a=-32
a=-32/-8
a=+4
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