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15x-19=13x+11
We move all terms to the left:
15x-19-(13x+11)=0
We get rid of parentheses
15x-13x-11-19=0
We add all the numbers together, and all the variables
2x-30=0
We move all terms containing x to the left, all other terms to the right
2x=30
x=30/2
x=15
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