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15+4x=12.50
We move all terms to the left:
15+4x-(12.50)=0
We add all the numbers together, and all the variables
4x+15-(12.5)=0
We add all the numbers together, and all the variables
4x+2.5=0
We move all terms containing x to the left, all other terms to the right
4x=-2.5
x=-2.5/4
x=-1/1.6
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