20k+90=10k+120

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Solution for 20k+90=10k+120 equation: 


Simplifying
20k + 90 = 10k + 120

Reorder the terms:
90 + 20k = 10k + 120

Reorder the terms:
90 + 20k = 120 + 10k

Solving
90 + 20k = 120 + 10k

Solving for variable 'k'.

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

Add '-10k' to each side of the equation.
90 + 20k + -10k = 120 + 10k + -10k

Combine like terms: 20k + -10k = 10k
90 + 10k = 120 + 10k + -10k

Combine like terms: 10k + -10k = 0
90 + 10k = 120 + 0
90 + 10k = 120

Add '-90' to each side of the equation.
90 + -90 + 10k = 120 + -90

Combine like terms: 90 + -90 = 0
0 + 10k = 120 + -90
10k = 120 + -90

Combine like terms: 120 + -90 = 30
10k = 30

Divide each side by '10'.
k = 3

Simplifying
k = 3

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