15x+x=400

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Solution for 15x+x=400 equation: 



15x+x=400

We move all terms to the left:

15x+x-(400)=0

We add all the numbers together, and all the variables

16x-400=0

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

16x=400

x=400/16

x=25

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