180-m=2(90-m)+78

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Solution for 180-m=2(90-m)+78 equation:


Simplifying
180 + -1m = 2(90 + -1m) + 78
180 + -1m = (90 * 2 + -1m * 2) + 78
180 + -1m = (180 + -2m) + 78

Reorder the terms:
180 + -1m = 180 + 78 + -2m

Combine like terms: 180 + 78 = 258
180 + -1m = 258 + -2m

Solving
180 + -1m = 258 + -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.
180 + -1m + 2m = 258 + -2m + 2m

Combine like terms: -1m + 2m = 1m
180 + 1m = 258 + -2m + 2m

Combine like terms: -2m + 2m = 0
180 + 1m = 258 + 0
180 + 1m = 258

Add '-180' to each side of the equation.
180 + -180 + 1m = 258 + -180

Combine like terms: 180 + -180 = 0
0 + 1m = 258 + -180
1m = 258 + -180

Combine like terms: 258 + -180 = 78
1m = 78

Divide each side by '1'.
m = 78

Simplifying
m = 78

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