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Simplifying
8m2 + -7 = 641
Reorder the terms:
-7 + 8m2 = 641
Solving
-7 + 8m2 = 641
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 + 8m2 = 641 + 7
Combine like terms: -7 + 7 = 0
0 + 8m2 = 641 + 7
8m2 = 641 + 7
Combine like terms: 641 + 7 = 648
8m2 = 648
Divide each side by '8'.
m2 = 81
Simplifying
m2 = 81
Take the square root of each side:
m = {-9, 9}
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