10(10+k)=-90

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


Simplifying
10(10 + k) = -90
(10 * 10 + k * 10) = -90
(100 + 10k) = -90

Solving
100 + 10k = -90

Solving for variable 'k'.

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

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

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

Combine like terms: -90 + -100 = -190
10k = -190

Divide each side by '10'.
k = -19

Simplifying
k = -19

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