(.1x-20)+(2x-55)=90

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Solution for (.1x-20)+(2x-55)=90 equation: 



(.1x-20)+(2x-55)=90

We move all terms to the left:

(.1x-20)+(2x-55)-(90)=0

We get rid of parentheses

.1x+2x-20-55-90=0

We add all the numbers together, and all the variables

2.1x-165=0

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

2.1x=165

x=165/2.1

x=78+1/1.75

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