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322=7(4-7a)
We move all terms to the left:
322-(7(4-7a))=0
We add all the numbers together, and all the variables
-(7(-7a+4))+322=0
We calculate terms in parentheses: -(7(-7a+4)), so:We get rid of parentheses
7(-7a+4)
We multiply parentheses
-49a+28
Back to the equation:
-(-49a+28)
49a-28+322=0
We add all the numbers together, and all the variables
49a+294=0
We move all terms containing a to the left, all other terms to the right
49a=-294
a=-294/49
a=-6
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