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157=5(1+5n)+2
We move all terms to the left:
157-(5(1+5n)+2)=0
We add all the numbers together, and all the variables
-(5(5n+1)+2)+157=0
We calculate terms in parentheses: -(5(5n+1)+2), so:We get rid of parentheses
5(5n+1)+2
We multiply parentheses
25n+5+2
We add all the numbers together, and all the variables
25n+7
Back to the equation:
-(25n+7)
-25n-7+157=0
We add all the numbers together, and all the variables
-25n+150=0
We move all terms containing n to the left, all other terms to the right
-25n=-150
n=-150/-25
n=+6
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