9+3m=-(m+7)

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Solution for 9+3m=-(m+7) equation:


Simplifying
9 + 3m = -1(m + 7)

Reorder the terms:
9 + 3m = -1(7 + m)
9 + 3m = (7 * -1 + m * -1)
9 + 3m = (-7 + -1m)

Solving
9 + 3m = -7 + -1m

Solving for variable 'm'.

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

Add 'm' to each side of the equation.
9 + 3m + m = -7 + -1m + m

Combine like terms: 3m + m = 4m
9 + 4m = -7 + -1m + m

Combine like terms: -1m + m = 0
9 + 4m = -7 + 0
9 + 4m = -7

Add '-9' to each side of the equation.
9 + -9 + 4m = -7 + -9

Combine like terms: 9 + -9 = 0
0 + 4m = -7 + -9
4m = -7 + -9

Combine like terms: -7 + -9 = -16
4m = -16

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

Simplifying
m = -4

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