100+0.30x=40+0.80x

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Solution for 100+0.30x=40+0.80x equation: 



100+0.30x=40+0.80x

We move all terms to the left:

100+0.30x-(40+0.80x)=0

We add all the numbers together, and all the variables

0.30x-(0.80x+40)+100=0

We get rid of parentheses

0.30x-0.80x-40+100=0

We add all the numbers together, and all the variables

-0.5x+60=0

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

-0.5x=-60

x=-60/-0.5

x=+120

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