20km+21km+c+90=180

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Solution for 20km+21km+c+90=180 equation:


Simplifying
20km + 21km + c + 90 = 180

Reorder the terms:
90 + c + 20km + 21km = 180

Combine like terms: 20km + 21km = 41km
90 + c + 41km = 180

Solving
90 + c + 41km = 180

Solving for variable 'c'.

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

Add '-90' to each side of the equation.
90 + c + -90 + 41km = 180 + -90

Reorder the terms:
90 + -90 + c + 41km = 180 + -90

Combine like terms: 90 + -90 = 0
0 + c + 41km = 180 + -90
c + 41km = 180 + -90

Combine like terms: 180 + -90 = 90
c + 41km = 90

Add '-41km' to each side of the equation.
c + 41km + -41km = 90 + -41km

Combine like terms: 41km + -41km = 0
c + 0 = 90 + -41km
c = 90 + -41km

Simplifying
c = 90 + -41km

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