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

-(-2.5x+4)+21.50=0

We add all the numbers together, and all the variables

-(-2.5x+4)+21.5=0

We get rid of parentheses

2.5x-4+21.5=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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