7(1+7m)=-42

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Solution for 7(1+7m)=-42 equation: 


Simplifying
7(1 + 7m) = -42
(1 * 7 + 7m * 7) = -42
(7 + 49m) = -42

Solving
7 + 49m = -42

Solving for variable 'm'.

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

Add '-7' to each side of the equation.
7 + -7 + 49m = -42 + -7

Combine like terms: 7 + -7 = 0
0 + 49m = -42 + -7
49m = -42 + -7

Combine like terms: -42 + -7 = -49
49m = -49

Divide each side by '49'.
m = -1

Simplifying
m = -1

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