x-3y+21=0

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Solution for x-3y+21=0 equation:


Simplifying
x + -3y + 21 = 0

Reorder the terms:
21 + x + -3y = 0

Solving
21 + x + -3y = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + x + -21 + -3y = 0 + -21

Reorder the terms:
21 + -21 + x + -3y = 0 + -21

Combine like terms: 21 + -21 = 0
0 + x + -3y = 0 + -21
x + -3y = 0 + -21

Combine like terms: 0 + -21 = -21
x + -3y = -21

Add '3y' to each side of the equation.
x + -3y + 3y = -21 + 3y

Combine like terms: -3y + 3y = 0
x + 0 = -21 + 3y
x = -21 + 3y

Simplifying
x = -21 + 3y

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