15x-(-6x)=(-84)

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Solution for 15x-(-6x)=(-84) equation: 


Simplifying
15x + -1(-6x) = (-84)

Remove parenthesis around (-6x)
15x + -1 * -6x = (-84)

Multiply -1 * -6
15x + 6x = (-84)

Combine like terms: 15x + 6x = 21x
21x = (-84)
21x = -84

Solving
21x = -84

Solving for variable 'x'.

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

Divide each side by '21'.
x = -4

Simplifying
x = -4

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