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9x-19=7x+13
We move all terms to the left:
9x-19-(7x+13)=0
We get rid of parentheses
9x-7x-13-19=0
We add all the numbers together, and all the variables
2x-32=0
We move all terms containing x to the left, all other terms to the right
2x=32
x=32/2
x=16
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