4-(m+10)-2(m+5)=20

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Solution for 4-(m+10)-2(m+5)=20 equation: 


Simplifying
4 + -1(m + 10) + -2(m + 5) = 20

Reorder the terms:
4 + -1(10 + m) + -2(m + 5) = 20
4 + (10 * -1 + m * -1) + -2(m + 5) = 20
4 + (-10 + -1m) + -2(m + 5) = 20

Reorder the terms:
4 + -10 + -1m + -2(5 + m) = 20
4 + -10 + -1m + (5 * -2 + m * -2) = 20
4 + -10 + -1m + (-10 + -2m) = 20

Reorder the terms:
4 + -10 + -10 + -1m + -2m = 20

Combine like terms: 4 + -10 = -6
-6 + -10 + -1m + -2m = 20

Combine like terms: -6 + -10 = -16
-16 + -1m + -2m = 20

Combine like terms: -1m + -2m = -3m
-16 + -3m = 20

Solving
-16 + -3m = 20

Solving for variable 'm'.

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

Add '16' to each side of the equation.
-16 + 16 + -3m = 20 + 16

Combine like terms: -16 + 16 = 0
0 + -3m = 20 + 16
-3m = 20 + 16

Combine like terms: 20 + 16 = 36
-3m = 36

Divide each side by '-3'.
m = -12

Simplifying
m = -12

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