15x+85=400

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Solution for 15x+85=400 equation: 



15x+85=400

We move all terms to the left:

15x+85-(400)=0

We add all the numbers together, and all the variables

15x-315=0

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

15x=315

x=315/15

x=21

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