3y-9x+8=21

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Solution for 3y-9x+8=21 equation:


Simplifying
3y + -9x + 8 = 21

Reorder the terms:
8 + -9x + 3y = 21

Solving
8 + -9x + 3y = 21

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -9x + -8 + 3y = 21 + -8

Reorder the terms:
8 + -8 + -9x + 3y = 21 + -8

Combine like terms: 8 + -8 = 0
0 + -9x + 3y = 21 + -8
-9x + 3y = 21 + -8

Combine like terms: 21 + -8 = 13
-9x + 3y = 13

Add '-3y' to each side of the equation.
-9x + 3y + -3y = 13 + -3y

Combine like terms: 3y + -3y = 0
-9x + 0 = 13 + -3y
-9x = 13 + -3y

Divide each side by '-9'.
x = -1.444444444 + 0.3333333333y

Simplifying
x = -1.444444444 + 0.3333333333y

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