3k^2+k^2=16

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Solution for 3k^2+k^2=16 equation: 


Simplifying
3k2 + k2 = 16

Combine like terms: 3k2 + k2 = 4k2
4k2 = 16

Solving
4k2 = 16

Solving for variable 'k'.

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

Divide each side by '4'.
k2 = 4

Simplifying
k2 = 4

Take the square root of each side:
k = {-2, 2}

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