30=40-0.25x

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Solution for 30=40-0.25x equation: 



30=40-0.25x

We move all terms to the left:

30-(40-0.25x)=0

We add all the numbers together, and all the variables

-(-0.25x+40)+30=0

We get rid of parentheses

0.25x-40+30=0

We add all the numbers together, and all the variables

0.25x-10=0

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

0.25x=10

x=10/0.25

x=40

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