20=-9+8(c-7)

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Solution for 20=-9+8(c-7) equation:


Simplifying
20 = -9 + 8(c + -7)

Reorder the terms:
20 = -9 + 8(-7 + c)
20 = -9 + (-7 * 8 + c * 8)
20 = -9 + (-56 + 8c)

Combine like terms: -9 + -56 = -65
20 = -65 + 8c

Solving
20 = -65 + 8c

Solving for variable 'c'.

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

Add '-8c' to each side of the equation.
20 + -8c = -65 + 8c + -8c

Combine like terms: 8c + -8c = 0
20 + -8c = -65 + 0
20 + -8c = -65

Add '-20' to each side of the equation.
20 + -20 + -8c = -65 + -20

Combine like terms: 20 + -20 = 0
0 + -8c = -65 + -20
-8c = -65 + -20

Combine like terms: -65 + -20 = -85
-8c = -85

Divide each side by '-8'.
c = 10.625

Simplifying
c = 10.625

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