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5x+15x=10x-x+3
We move all terms to the left:
5x+15x-(10x-x+3)=0
We add all the numbers together, and all the variables
5x+15x-(9x+3)=0
We add all the numbers together, and all the variables
20x-(9x+3)=0
We get rid of parentheses
20x-9x-3=0
We add all the numbers together, and all the variables
11x-3=0
We move all terms containing x to the left, all other terms to the right
11x=3
x=3/11
x=3/11
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