100-50x=90-20x

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Solution for 100-50x=90-20x equation: 



100-50x=90-20x

We move all terms to the left:

100-50x-(90-20x)=0

We add all the numbers together, and all the variables

-50x-(-20x+90)+100=0

We get rid of parentheses

-50x+20x-90+100=0

We add all the numbers together, and all the variables

-30x+10=0

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

-30x=-10

x=-10/-30

x=1/3

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