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15x-20=11x+49
We move all terms to the left:
15x-20-(11x+49)=0
We get rid of parentheses
15x-11x-49-20=0
We add all the numbers together, and all the variables
4x-69=0
We move all terms containing x to the left, all other terms to the right
4x=69
x=69/4
x=17+1/4
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