-3m+21-7(m-3)=8m-(4m-9)-6m+1

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Solution for -3m+21-7(m-3)=8m-(4m-9)-6m+1 equation:


Simplifying
-3m + 21 + -7(m + -3) = 8m + -1(4m + -9) + -6m + 1

Reorder the terms:
-3m + 21 + -7(-3 + m) = 8m + -1(4m + -9) + -6m + 1
-3m + 21 + (-3 * -7 + m * -7) = 8m + -1(4m + -9) + -6m + 1
-3m + 21 + (21 + -7m) = 8m + -1(4m + -9) + -6m + 1

Reorder the terms:
21 + 21 + -3m + -7m = 8m + -1(4m + -9) + -6m + 1

Combine like terms: 21 + 21 = 42
42 + -3m + -7m = 8m + -1(4m + -9) + -6m + 1

Combine like terms: -3m + -7m = -10m
42 + -10m = 8m + -1(4m + -9) + -6m + 1

Reorder the terms:
42 + -10m = 8m + -1(-9 + 4m) + -6m + 1
42 + -10m = 8m + (-9 * -1 + 4m * -1) + -6m + 1
42 + -10m = 8m + (9 + -4m) + -6m + 1

Reorder the terms:
42 + -10m = 9 + 1 + 8m + -4m + -6m

Combine like terms: 9 + 1 = 10
42 + -10m = 10 + 8m + -4m + -6m

Combine like terms: 8m + -4m = 4m
42 + -10m = 10 + 4m + -6m

Combine like terms: 4m + -6m = -2m
42 + -10m = 10 + -2m

Solving
42 + -10m = 10 + -2m

Solving for variable 'm'.

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

Add '2m' to each side of the equation.
42 + -10m + 2m = 10 + -2m + 2m

Combine like terms: -10m + 2m = -8m
42 + -8m = 10 + -2m + 2m

Combine like terms: -2m + 2m = 0
42 + -8m = 10 + 0
42 + -8m = 10

Add '-42' to each side of the equation.
42 + -42 + -8m = 10 + -42

Combine like terms: 42 + -42 = 0
0 + -8m = 10 + -42
-8m = 10 + -42

Combine like terms: 10 + -42 = -32
-8m = -32

Divide each side by '-8'.
m = 4

Simplifying
m = 4

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