90+0.7x=70+0.9x

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Solution for 90+0.7x=70+0.9x equation: 



90+0.7x=70+0.9x

We move all terms to the left:

90+0.7x-(70+0.9x)=0

We add all the numbers together, and all the variables

0.7x-(0.9x+70)+90=0

We get rid of parentheses

0.7x-0.9x-70+90=0

We add all the numbers together, and all the variables

-0.2x+20=0

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

-0.2x=-20

x=-20/-0.2

x=+100

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