90=-6(-7+2m)

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Solution for 90=-6(-7+2m) equation:


Simplifying
90 = -6(-7 + 2m)
90 = (-7 * -6 + 2m * -6)
90 = (42 + -12m)

Solving
90 = 42 + -12m

Solving for variable 'm'.

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

Add '12m' to each side of the equation.
90 + 12m = 42 + -12m + 12m

Combine like terms: -12m + 12m = 0
90 + 12m = 42 + 0
90 + 12m = 42

Add '-90' to each side of the equation.
90 + -90 + 12m = 42 + -90

Combine like terms: 90 + -90 = 0
0 + 12m = 42 + -90
12m = 42 + -90

Combine like terms: 42 + -90 = -48
12m = -48

Divide each side by '12'.
m = -4

Simplifying
m = -4

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