9(9-k)+7=-7(k-4)-11

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Solution for 9(9-k)+7=-7(k-4)-11 equation:


Simplifying
9(9 + -1k) + 7 = -7(k + -4) + -11
(9 * 9 + -1k * 9) + 7 = -7(k + -4) + -11
(81 + -9k) + 7 = -7(k + -4) + -11

Reorder the terms:
81 + 7 + -9k = -7(k + -4) + -11

Combine like terms: 81 + 7 = 88
88 + -9k = -7(k + -4) + -11

Reorder the terms:
88 + -9k = -7(-4 + k) + -11
88 + -9k = (-4 * -7 + k * -7) + -11
88 + -9k = (28 + -7k) + -11

Reorder the terms:
88 + -9k = 28 + -11 + -7k

Combine like terms: 28 + -11 = 17
88 + -9k = 17 + -7k

Solving
88 + -9k = 17 + -7k

Solving for variable 'k'.

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

Add '7k' to each side of the equation.
88 + -9k + 7k = 17 + -7k + 7k

Combine like terms: -9k + 7k = -2k
88 + -2k = 17 + -7k + 7k

Combine like terms: -7k + 7k = 0
88 + -2k = 17 + 0
88 + -2k = 17

Add '-88' to each side of the equation.
88 + -88 + -2k = 17 + -88

Combine like terms: 88 + -88 = 0
0 + -2k = 17 + -88
-2k = 17 + -88

Combine like terms: 17 + -88 = -71
-2k = -71

Divide each side by '-2'.
k = 35.5

Simplifying
k = 35.5

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