100+0.4x=20+0.5x

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Solution for 100+0.4x=20+0.5x equation: 



100+0.4x=20+0.5x

We move all terms to the left:

100+0.4x-(20+0.5x)=0

We add all the numbers together, and all the variables

0.4x-(0.5x+20)+100=0

We get rid of parentheses

0.4x-0.5x-20+100=0

We add all the numbers together, and all the variables

-0.1x+80=0

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

-0.1x=-80

x=-80/-0.1

x=+800

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