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(3*3-a)+(a*2*2)=15
We move all terms to the left:
(3*3-a)+(a*2*2)-(15)=0
We add all the numbers together, and all the variables
(-1a+9)+(+a*2*2)-15=0
We get rid of parentheses
-1a+a*2*2+9-15=0
We add all the numbers together, and all the variables
-1a+a*2*2-6=0
Wy multiply elements
-1a+4a*2-6=0
Wy multiply elements
-1a+8a-6=0
We add all the numbers together, and all the variables
7a-6=0
We move all terms containing a to the left, all other terms to the right
7a=6
a=6/7
a=6/7
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