.5x+.75x+.85x=400

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Solution for .5x+.75x+.85x=400 equation: 



.5x+.75x+.85x=400

We move all terms to the left:

.5x+.75x+.85x-(400)=0

We add all the numbers together, and all the variables

2.1x-400=0

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

2.1x=400

x=400/2.1

x=190+1/2.1

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