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2.5x+3=2x+15x=
We move all terms to the left:
2.5x+3-(2x+15x)=0
We add all the numbers together, and all the variables
2.5x-(+17x)+3=0
We get rid of parentheses
2.5x-17x+3=0
We add all the numbers together, and all the variables
-14.5x+3=0
We move all terms containing x to the left, all other terms to the right
-14.5x=-3
x=-3/-14.5
x=3/14.5
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