91=7(3a-1)

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Solution for 91=7(3a-1) equation:



91=7(3a-1)
We move all terms to the left:
91-(7(3a-1))=0
We calculate terms in parentheses: -(7(3a-1)), so:
7(3a-1)
We multiply parentheses
21a-7
Back to the equation:
-(21a-7)
We get rid of parentheses
-21a+7+91=0
We add all the numbers together, and all the variables
-21a+98=0
We move all terms containing a to the left, all other terms to the right
-21a=-98
a=-98/-21
a=4+2/3

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