15=-9.1x+21

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Solution for 15=-9.1x+21 equation: 



15=-9.1x+21

We move all terms to the left:

15-(-9.1x+21)=0

We get rid of parentheses

9.1x-21+15=0

We add all the numbers together, and all the variables

9.1x-6=0

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

9.1x=6

x=6/9.1

x=2/3.0333333333333

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