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4x-5(x+2)=2x+1
We move all terms to the left:
4x-5(x+2)-(2x+1)=0
We multiply parentheses
4x-5x-(2x+1)-10=0
We get rid of parentheses
4x-5x-2x-1-10=0
We add all the numbers together, and all the variables
-3x-11=0
We move all terms containing x to the left, all other terms to the right
-3x=11
x=11/-3
x=-3+2/3
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