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(x+11)42=30(3x+1)
We move all terms to the left:
(x+11)42-(30(3x+1))=0
We multiply parentheses
42x-(30(3x+1))+462=0
We calculate terms in parentheses: -(30(3x+1)), so:We get rid of parentheses
30(3x+1)
We multiply parentheses
90x+30
Back to the equation:
-(90x+30)
42x-90x-30+462=0
We add all the numbers together, and all the variables
-48x+432=0
We move all terms containing x to the left, all other terms to the right
-48x=-432
x=-432/-48
x=+9
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