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4(2x+9)=12x+50
We move all terms to the left:
4(2x+9)-(12x+50)=0
We multiply parentheses
8x-(12x+50)+36=0
We get rid of parentheses
8x-12x-50+36=0
We add all the numbers together, and all the variables
-4x-14=0
We move all terms containing x to the left, all other terms to the right
-4x=14
x=14/-4
x=-3+1/2
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