-7.2*2.6+(-7.2)*3.9=m(2.6+3.9)

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Solution for -7.2*2.6+(-7.2)*3.9=m(2.6+3.9) equation: 


Simplifying
-7.2 * 2.6 + (-7.2) * 3.9 = m(2.6 + 3.9)

Multiply -7.2 * 2.6
-18.72 + (-7.2) * 3.9 = m(2.6 + 3.9)

Multiply -7.2 * 3.9
-18.72 + -28.08 = m(2.6 + 3.9)

Combine like terms: -18.72 + -28.08 = -46.8
-46.8 = m(2.6 + 3.9)

Combine like terms: 2.6 + 3.9 = 6.5
-46.8 = m(6.5)

Reorder the terms for easier multiplication:
-46.8 = 6.5m

Solving
-46.8 = 6.5m

Solving for variable 'm'.

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

Add '-6.5m' to each side of the equation.
-46.8 + -6.5m = 6.5m + -6.5m

Combine like terms: 6.5m + -6.5m = 0.0
-46.8 + -6.5m = 0.0

Add '46.8' to each side of the equation.
-46.8 + 46.8 + -6.5m = 0.0 + 46.8

Combine like terms: -46.8 + 46.8 = 0.0
0.0 + -6.5m = 0.0 + 46.8
-6.5m = 0.0 + 46.8

Combine like terms: 0.0 + 46.8 = 46.8
-6.5m = 46.8

Divide each side by '-6.5'.
m = -7.2

Simplifying
m = -7.2

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