21.50-4=2.50x

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Solution for 21.50-4=2.50x equation: 



21.50-4=2.50x

We move all terms to the left:

21.50-4-(2.50x)=0

We add all the numbers together, and all the variables

-(+2.50x)+21.50-4=0

We add all the numbers together, and all the variables

-(+2.50x)+17.5=0

We get rid of parentheses

-2.50x+17.5=0

We add all the numbers together, and all the variables

-2.5x+17.5=0

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

-2.5x=-17.5

x=-17.5/-2.5

x=+7

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