-243=-90+-9k

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Solution for -243=-90+-9k equation:


Simplifying
-243 = -90 + -9k

Solving
-243 = -90 + -9k

Solving for variable 'k'.

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

Add '9k' to each side of the equation.
-243 + 9k = -90 + -9k + 9k

Combine like terms: -9k + 9k = 0
-243 + 9k = -90 + 0
-243 + 9k = -90

Add '243' to each side of the equation.
-243 + 243 + 9k = -90 + 243

Combine like terms: -243 + 243 = 0
0 + 9k = -90 + 243
9k = -90 + 243

Combine like terms: -90 + 243 = 153
9k = 153

Divide each side by '9'.
k = 17

Simplifying
k = 17

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