21-x=3x+5

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Solution for 21-x=3x+5 equation: 



21-x=3x+5

We move all terms to the left:

21-x-(3x+5)=0

We add all the numbers together, and all the variables

-1x-(3x+5)+21=0

We get rid of parentheses

-1x-3x-5+21=0

We add all the numbers together, and all the variables

-4x+16=0

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

-4x=-16

x=-16/-4

x=+4

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