15-6x=-21

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Solution for 15-6x=-21 equation: 


Simplifying
15 + -6x = -21

Solving
15 + -6x = -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 + -6x = -21 + -15

Combine like terms: 15 + -15 = 0
0 + -6x = -21 + -15
-6x = -21 + -15

Combine like terms: -21 + -15 = -36
-6x = -36

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

Simplifying
x = 6

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