40+k+2k=70

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Solution for 40+k+2k=70 equation: 


Simplifying
40 + k + 2k = 70

Combine like terms: k + 2k = 3k
40 + 3k = 70

Solving
40 + 3k = 70

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 + 3k = 70 + -40

Combine like terms: 40 + -40 = 0
0 + 3k = 70 + -40
3k = 70 + -40

Combine like terms: 70 + -40 = 30
3k = 30

Divide each side by '3'.
k = 10

Simplifying
k = 10

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