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2(3442+2a)=123
We move all terms to the left:
2(3442+2a)-(123)=0
We add all the numbers together, and all the variables
2(2a+3442)-123=0
We multiply parentheses
4a+6884-123=0
We add all the numbers together, and all the variables
4a+6761=0
We move all terms containing a to the left, all other terms to the right
4a=-6761
a=-6761/4
a=-1690+1/4
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