10k+90=9k+9

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Solution for 10k+90=9k+9 equation:


Simplifying
10k + 90 = 9k + 9

Reorder the terms:
90 + 10k = 9k + 9

Reorder the terms:
90 + 10k = 9 + 9k

Solving
90 + 10k = 9 + 9k

Solving for variable 'k'.

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

Add '-9k' to each side of the equation.
90 + 10k + -9k = 9 + 9k + -9k

Combine like terms: 10k + -9k = 1k
90 + 1k = 9 + 9k + -9k

Combine like terms: 9k + -9k = 0
90 + 1k = 9 + 0
90 + 1k = 9

Add '-90' to each side of the equation.
90 + -90 + 1k = 9 + -90

Combine like terms: 90 + -90 = 0
0 + 1k = 9 + -90
1k = 9 + -90

Combine like terms: 9 + -90 = -81
1k = -81

Divide each side by '1'.
k = -81

Simplifying
k = -81

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