20k+90=10k+130

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Solution for 20k+90=10k+130 equation: 


Simplifying
20k + 90 = 10k + 130

Reorder the terms:
90 + 20k = 10k + 130

Reorder the terms:
90 + 20k = 130 + 10k

Solving
90 + 20k = 130 + 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 = 130 + 10k + -10k

Combine like terms: 20k + -10k = 10k
90 + 10k = 130 + 10k + -10k

Combine like terms: 10k + -10k = 0
90 + 10k = 130 + 0
90 + 10k = 130

Add '-90' to each side of the equation.
90 + -90 + 10k = 130 + -90

Combine like terms: 90 + -90 = 0
0 + 10k = 130 + -90
10k = 130 + -90

Combine like terms: 130 + -90 = 40
10k = 40

Divide each side by '10'.
k = 4

Simplifying
k = 4

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