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7-4(2x+5)=3x-18
We move all terms to the left:
7-4(2x+5)-(3x-18)=0
We multiply parentheses
-8x-(3x-18)-20+7=0
We get rid of parentheses
-8x-3x+18-20+7=0
We add all the numbers together, and all the variables
-11x+5=0
We move all terms containing x to the left, all other terms to the right
-11x=-5
x=-5/-11
x=5/11
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