7(m-21)-6(4m-13)=84

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Solution for 7(m-21)-6(4m-13)=84 equation:


Simplifying
7(m + -21) + -6(4m + -13) = 84

Reorder the terms:
7(-21 + m) + -6(4m + -13) = 84
(-21 * 7 + m * 7) + -6(4m + -13) = 84
(-147 + 7m) + -6(4m + -13) = 84

Reorder the terms:
-147 + 7m + -6(-13 + 4m) = 84
-147 + 7m + (-13 * -6 + 4m * -6) = 84
-147 + 7m + (78 + -24m) = 84

Reorder the terms:
-147 + 78 + 7m + -24m = 84

Combine like terms: -147 + 78 = -69
-69 + 7m + -24m = 84

Combine like terms: 7m + -24m = -17m
-69 + -17m = 84

Solving
-69 + -17m = 84

Solving for variable 'm'.

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

Add '69' to each side of the equation.
-69 + 69 + -17m = 84 + 69

Combine like terms: -69 + 69 = 0
0 + -17m = 84 + 69
-17m = 84 + 69

Combine like terms: 84 + 69 = 153
-17m = 153

Divide each side by '-17'.
m = -9

Simplifying
m = -9

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