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2x-7x-13=5x+9-13
We move all terms to the left:
2x-7x-13-(5x+9-13)=0
We add all the numbers together, and all the variables
2x-7x-(5x-4)-13=0
We add all the numbers together, and all the variables
-5x-(5x-4)-13=0
We get rid of parentheses
-5x-5x+4-13=0
We add all the numbers together, and all the variables
-10x-9=0
We move all terms containing x to the left, all other terms to the right
-10x=9
x=9/-10
x=-9/10
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