5(k-3)+3(8-k)=21-7(k-6)

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Solution for 5(k-3)+3(8-k)=21-7(k-6) equation:


Simplifying
5(k + -3) + 3(8 + -1k) = 21 + -7(k + -6)

Reorder the terms:
5(-3 + k) + 3(8 + -1k) = 21 + -7(k + -6)
(-3 * 5 + k * 5) + 3(8 + -1k) = 21 + -7(k + -6)
(-15 + 5k) + 3(8 + -1k) = 21 + -7(k + -6)
-15 + 5k + (8 * 3 + -1k * 3) = 21 + -7(k + -6)
-15 + 5k + (24 + -3k) = 21 + -7(k + -6)

Reorder the terms:
-15 + 24 + 5k + -3k = 21 + -7(k + -6)

Combine like terms: -15 + 24 = 9
9 + 5k + -3k = 21 + -7(k + -6)

Combine like terms: 5k + -3k = 2k
9 + 2k = 21 + -7(k + -6)

Reorder the terms:
9 + 2k = 21 + -7(-6 + k)
9 + 2k = 21 + (-6 * -7 + k * -7)
9 + 2k = 21 + (42 + -7k)

Combine like terms: 21 + 42 = 63
9 + 2k = 63 + -7k

Solving
9 + 2k = 63 + -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.
9 + 2k + 7k = 63 + -7k + 7k

Combine like terms: 2k + 7k = 9k
9 + 9k = 63 + -7k + 7k

Combine like terms: -7k + 7k = 0
9 + 9k = 63 + 0
9 + 9k = 63

Add '-9' to each side of the equation.
9 + -9 + 9k = 63 + -9

Combine like terms: 9 + -9 = 0
0 + 9k = 63 + -9
9k = 63 + -9

Combine like terms: 63 + -9 = 54
9k = 54

Divide each side by '9'.
k = 6

Simplifying
k = 6

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