9(1-5k)-7(-10k+8)=-97

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Solution for 9(1-5k)-7(-10k+8)=-97 equation:


Simplifying
9(1 + -5k) + -7(-10k + 8) = -97
(1 * 9 + -5k * 9) + -7(-10k + 8) = -97
(9 + -45k) + -7(-10k + 8) = -97

Reorder the terms:
9 + -45k + -7(8 + -10k) = -97
9 + -45k + (8 * -7 + -10k * -7) = -97
9 + -45k + (-56 + 70k) = -97

Reorder the terms:
9 + -56 + -45k + 70k = -97

Combine like terms: 9 + -56 = -47
-47 + -45k + 70k = -97

Combine like terms: -45k + 70k = 25k
-47 + 25k = -97

Solving
-47 + 25k = -97

Solving for variable 'k'.

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

Add '47' to each side of the equation.
-47 + 47 + 25k = -97 + 47

Combine like terms: -47 + 47 = 0
0 + 25k = -97 + 47
25k = -97 + 47

Combine like terms: -97 + 47 = -50
25k = -50

Divide each side by '25'.
k = -2

Simplifying
k = -2

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