15-1x=21

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Solution for 15-1x=21 equation: 


Simplifying
15 + -1x = 21

Solving
15 + -1x = 21

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -1x = 21 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 21 + -15
-1x = 21 + -15

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

Divide each side by '-1'.
x = -6

Simplifying
x = -6

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