-40=3(1-3k)+8(7-3k)

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Solution for -40=3(1-3k)+8(7-3k) equation:


Simplifying
-40 = 3(1 + -3k) + 8(7 + -3k)
-40 = (1 * 3 + -3k * 3) + 8(7 + -3k)
-40 = (3 + -9k) + 8(7 + -3k)
-40 = 3 + -9k + (7 * 8 + -3k * 8)
-40 = 3 + -9k + (56 + -24k)

Reorder the terms:
-40 = 3 + 56 + -9k + -24k

Combine like terms: 3 + 56 = 59
-40 = 59 + -9k + -24k

Combine like terms: -9k + -24k = -33k
-40 = 59 + -33k

Solving
-40 = 59 + -33k

Solving for variable 'k'.

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

Add '33k' to each side of the equation.
-40 + 33k = 59 + -33k + 33k

Combine like terms: -33k + 33k = 0
-40 + 33k = 59 + 0
-40 + 33k = 59

Add '40' to each side of the equation.
-40 + 40 + 33k = 59 + 40

Combine like terms: -40 + 40 = 0
0 + 33k = 59 + 40
33k = 59 + 40

Combine like terms: 59 + 40 = 99
33k = 99

Divide each side by '33'.
k = 3

Simplifying
k = 3

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