2+6-x=21

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Solution for 2+6-x=21 equation: 


Simplifying
2 + 6 + -1x = 21

Combine like terms: 2 + 6 = 8
8 + -1x = 21

Solving
8 + -1x = 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 + -8 + -1x = 21 + -8

Combine like terms: 8 + -8 = 0
0 + -1x = 21 + -8
-1x = 21 + -8

Combine like terms: 21 + -8 = 13
-1x = 13

Divide each side by '-1'.
x = -13

Simplifying
x = -13

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