X+21=4x-3

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Solution for X+21=4x-3 equation: 



X+21=4X-3

We move all terms to the left:

X+21-(4X-3)=0

We get rid of parentheses

X-4X+3+21=0

We add all the numbers together, and all the variables

-3X+24=0

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

-3X=-24

X=-24/-3

X=+8

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