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-4(a-11)=2+(-9)
We move all terms to the left:
-4(a-11)-(2+(-9))=0
We add all the numbers together, and all the variables
-4(a-11)+7=0
We multiply parentheses
-4a+44+7=0
We add all the numbers together, and all the variables
-4a+51=0
We move all terms containing a to the left, all other terms to the right
-4a=-51
a=-51/-4
a=12+3/4
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