10k+40-5k=90

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Solution for 10k+40-5k=90 equation: 


Simplifying
10k + 40 + -5k = 90

Reorder the terms:
40 + 10k + -5k = 90

Combine like terms: 10k + -5k = 5k
40 + 5k = 90

Solving
40 + 5k = 90

Solving for variable 'k'.

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

Add '-40' to each side of the equation.
40 + -40 + 5k = 90 + -40

Combine like terms: 40 + -40 = 0
0 + 5k = 90 + -40
5k = 90 + -40

Combine like terms: 90 + -40 = 50
5k = 50

Divide each side by '5'.
k = 10

Simplifying
k = 10

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