40k+90=30k+100

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Solution for 40k+90=30k+100 equation:


Simplifying
40k + 90 = 30k + 100

Reorder the terms:
90 + 40k = 30k + 100

Reorder the terms:
90 + 40k = 100 + 30k

Solving
90 + 40k = 100 + 30k

Solving for variable 'k'.

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

Add '-30k' to each side of the equation.
90 + 40k + -30k = 100 + 30k + -30k

Combine like terms: 40k + -30k = 10k
90 + 10k = 100 + 30k + -30k

Combine like terms: 30k + -30k = 0
90 + 10k = 100 + 0
90 + 10k = 100

Add '-90' to each side of the equation.
90 + -90 + 10k = 100 + -90

Combine like terms: 90 + -90 = 0
0 + 10k = 100 + -90
10k = 100 + -90

Combine like terms: 100 + -90 = 10
10k = 10

Divide each side by '10'.
k = 1

Simplifying
k = 1

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