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Simplifying
3(m2 + 4) = 20
Reorder the terms:
3(4 + m2) = 20
(4 * 3 + m2 * 3) = 20
(12 + 3m2) = 20
Solving
12 + 3m2 = 20
Solving for variable 'm'.
Move all terms containing m to the left, all other terms to the right.
Add '-12' to each side of the equation.
12 + -12 + 3m2 = 20 + -12
Combine like terms: 12 + -12 = 0
0 + 3m2 = 20 + -12
3m2 = 20 + -12
Combine like terms: 20 + -12 = 8
3m2 = 8
Divide each side by '3'.
m2 = 2.666666667
Simplifying
m2 = 2.666666667
Take the square root of each side:
m = {-1.632993162, 1.632993162}
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