.2(25-5k)=21-3(k-4)

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Solution for .2(25-5k)=21-3(k-4) equation:


Simplifying
0.2(25 + -5k) = 21 + -3(k + -4)
(25 * 0.2 + -5k * 0.2) = 21 + -3(k + -4)
(5 + -1k) = 21 + -3(k + -4)

Reorder the terms:
5 + -1k = 21 + -3(-4 + k)
5 + -1k = 21 + (-4 * -3 + k * -3)
5 + -1k = 21 + (12 + -3k)

Combine like terms: 21 + 12 = 33
5 + -1k = 33 + -3k

Solving
5 + -1k = 33 + -3k

Solving for variable 'k'.

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

Add '3k' to each side of the equation.
5 + -1k + 3k = 33 + -3k + 3k

Combine like terms: -1k + 3k = 2k
5 + 2k = 33 + -3k + 3k

Combine like terms: -3k + 3k = 0
5 + 2k = 33 + 0
5 + 2k = 33

Add '-5' to each side of the equation.
5 + -5 + 2k = 33 + -5

Combine like terms: 5 + -5 = 0
0 + 2k = 33 + -5
2k = 33 + -5

Combine like terms: 33 + -5 = 28
2k = 28

Divide each side by '2'.
k = 14

Simplifying
k = 14

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