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-4.5x+2.3=-15.7
We move all terms to the left:
-4.5x+2.3-(-15.7)=0
We add all the numbers together, and all the variables
-4.5x+18=0
We move all terms containing x to the left, all other terms to the right
-4.5x=-18
x=-18/-4.5
x=+4
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