3(k+10)=90

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Solution for 3(k+10)=90 equation: 


Simplifying
3(k + 10) = 90

Reorder the terms:
3(10 + k) = 90
(10 * 3 + k * 3) = 90
(30 + 3k) = 90

Solving
30 + 3k = 90

Solving for variable 'k'.

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

Add '-30' to each side of the equation.
30 + -30 + 3k = 90 + -30

Combine like terms: 30 + -30 = 0
0 + 3k = 90 + -30
3k = 90 + -30

Combine like terms: 90 + -30 = 60
3k = 60

Divide each side by '3'.
k = 20

Simplifying
k = 20

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