25=4x+21

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Solution for 25=4x+21 equation: 



25=4x+21

We move all terms to the left:

25-(4x+21)=0

We get rid of parentheses

-4x-21+25=0

We add all the numbers together, and all the variables

-4x+4=0

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

-4x=-4

x=-4/-4

x=1

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