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5+7x-20x=-x-9+10x
We move all terms to the left:
5+7x-20x-(-x-9+10x)=0
We add all the numbers together, and all the variables
7x-20x-(9x-9)+5=0
We add all the numbers together, and all the variables
-13x-(9x-9)+5=0
We get rid of parentheses
-13x-9x+9+5=0
We add all the numbers together, and all the variables
-22x+14=0
We move all terms containing x to the left, all other terms to the right
-22x=-14
x=-14/-22
x=7/11
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