21x=15-3x+10-x

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Solution for 21x=15-3x+10-x equation: 



21x=15-3x+10-x

We move all terms to the left:

21x-(15-3x+10-x)=0

We add all the numbers together, and all the variables

21x-(-4x+25)=0

We get rid of parentheses

21x+4x-25=0

We add all the numbers together, and all the variables

25x-25=0

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

25x=25

x=25/25

x=1

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