7(1-8m)=-217

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Solution for 7(1-8m)=-217 equation: 


Simplifying
7(1 + -8m) = -217
(1 * 7 + -8m * 7) = -217
(7 + -56m) = -217

Solving
7 + -56m = -217

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 + -56m = -217 + -7

Combine like terms: 7 + -7 = 0
0 + -56m = -217 + -7
-56m = -217 + -7

Combine like terms: -217 + -7 = -224
-56m = -224

Divide each side by '-56'.
m = 4

Simplifying
m = 4

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