15=4.3m-2.1(m-4)

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Solution for 15=4.3m-2.1(m-4) equation:


Simplifying
15 = 4.3m + -2.1(m + -4)

Reorder the terms:
15 = 4.3m + -2.1(-4 + m)
15 = 4.3m + (-4 * -2.1 + m * -2.1)
15 = 4.3m + (8.4 + -2.1m)

Reorder the terms:
15 = 8.4 + 4.3m + -2.1m

Combine like terms: 4.3m + -2.1m = 2.2m
15 = 8.4 + 2.2m

Solving
15 = 8.4 + 2.2m

Solving for variable 'm'.

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

Add '-2.2m' to each side of the equation.
15 + -2.2m = 8.4 + 2.2m + -2.2m

Combine like terms: 2.2m + -2.2m = 0.0
15 + -2.2m = 8.4 + 0.0
15 + -2.2m = 8.4

Add '-15' to each side of the equation.
15 + -15 + -2.2m = 8.4 + -15

Combine like terms: 15 + -15 = 0
0 + -2.2m = 8.4 + -15
-2.2m = 8.4 + -15

Combine like terms: 8.4 + -15 = -6.6
-2.2m = -6.6

Divide each side by '-2.2'.
m = 3

Simplifying
m = 3

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