7=-7(3+m)

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


Simplifying
7 = -7(3 + m)
7 = (3 * -7 + m * -7)
7 = (-21 + -7m)

Solving
7 = -21 + -7m

Solving for variable 'm'.

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

Add '7m' to each side of the equation.
7 + 7m = -21 + -7m + 7m

Combine like terms: -7m + 7m = 0
7 + 7m = -21 + 0
7 + 7m = -21

Add '-7' to each side of the equation.
7 + -7 + 7m = -21 + -7

Combine like terms: 7 + -7 = 0
0 + 7m = -21 + -7
7m = -21 + -7

Combine like terms: -21 + -7 = -28
7m = -28

Divide each side by '7'.
m = -4

Simplifying
m = -4

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