x+2.5x=400

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Solution for x+2.5x=400 equation: 



x+2.5x=400

We move all terms to the left:

x+2.5x-(400)=0

We add all the numbers together, and all the variables

3.5x-400=0

We move all terms containing x to the left, all other terms to the right

3.5x=400

x=400/3.5

x=114+1/3.5

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