120=x-0.9x

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Solution for 120=x-0.9x equation:



120=x-0.9x
We move all terms to the left:
120-(x-0.9x)=0
We add all the numbers together, and all the variables
-(+0.1x)+120=0
We get rid of parentheses
-0.1x+120=0
We move all terms containing x to the left, all other terms to the right
-0.1x=-120
x=-120/-0.1
x=+1200

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