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2x-3+4x-7=-12.5
We move all terms to the left:
2x-3+4x-7-(-12.5)=0
We add all the numbers together, and all the variables
6x+2.5=0
We move all terms containing x to the left, all other terms to the right
6x=-2.5
x=-2.5/6
x=-1/2.4
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