-x-2y+6=21

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Solution for -x-2y+6=21 equation:


Simplifying
-1x + -2y + 6 = 21

Reorder the terms:
6 + -1x + -2y = 21

Solving
6 + -1x + -2y = 21

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -1x + -6 + -2y = 21 + -6

Reorder the terms:
6 + -6 + -1x + -2y = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -1x + -2y = 21 + -6
-1x + -2y = 21 + -6

Combine like terms: 21 + -6 = 15
-1x + -2y = 15

Add '2y' to each side of the equation.
-1x + -2y + 2y = 15 + 2y

Combine like terms: -2y + 2y = 0
-1x + 0 = 15 + 2y
-1x = 15 + 2y

Divide each side by '-1'.
x = -15 + -2y

Simplifying
x = -15 + -2y

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