0.12x+0.13(900-x)=105

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Solution for 0.12x+0.13(900-x)=105 equation: 



0.12x+0.13(900-x)=105

We move all terms to the left:

0.12x+0.13(900-x)-(105)=0

We add all the numbers together, and all the variables

0.12x+0.13(-1x+900)-105=0

We multiply parentheses

0.12x-0.13x+117-105=0

We add all the numbers together, and all the variables

-0.01x+12=0

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

-0.01x=-12

x=-12/-0.01

x=+1200

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