3(5-k)-4(2-k)=9

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Solution for 3(5-k)-4(2-k)=9 equation:


Simplifying
3(5 + -1k) + -4(2 + -1k) = 9
(5 * 3 + -1k * 3) + -4(2 + -1k) = 9
(15 + -3k) + -4(2 + -1k) = 9
15 + -3k + (2 * -4 + -1k * -4) = 9
15 + -3k + (-8 + 4k) = 9

Reorder the terms:
15 + -8 + -3k + 4k = 9

Combine like terms: 15 + -8 = 7
7 + -3k + 4k = 9

Combine like terms: -3k + 4k = 1k
7 + 1k = 9

Solving
7 + 1k = 9

Solving for variable 'k'.

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

Add '-7' to each side of the equation.
7 + -7 + 1k = 9 + -7

Combine like terms: 7 + -7 = 0
0 + 1k = 9 + -7
1k = 9 + -7

Combine like terms: 9 + -7 = 2
1k = 2

Divide each side by '1'.
k = 2

Simplifying
k = 2

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