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