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6(4-a)-12=-5(2a+4)
We move all terms to the left:
6(4-a)-12-(-5(2a+4))=0
We add all the numbers together, and all the variables
6(-1a+4)-(-5(2a+4))-12=0
We multiply parentheses
-6a-(-5(2a+4))+24-12=0
We calculate terms in parentheses: -(-5(2a+4)), so:We add all the numbers together, and all the variables
-5(2a+4)
We multiply parentheses
-10a-20
Back to the equation:
-(-10a-20)
-6a-(-10a-20)+12=0
We get rid of parentheses
-6a+10a+20+12=0
We add all the numbers together, and all the variables
4a+32=0
We move all terms containing a to the left, all other terms to the right
4a=-32
a=-32/4
a=-8
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