(8.50)(30)-(r)(8.50)(30)=(5.95)(30)

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Solution for (8.50)(30)-(r)(8.50)(30)=(5.95)(30) equation: 


Simplifying
(8.50)(30) + -1(r)(8.50)(30) = (5.95)(30)

Multiply 8.50 * 30
255 + -1(r)(8.50)(30) = (5.95)(30)

Reorder the terms for easier multiplication:
255 + -1 * 8.50 * 30r = (5.95)(30)

Multiply -1 * 8.50
255 + -8.5 * 30r = (5.95)(30)

Multiply -8.5 * 30
255 + -255r = (5.95)(30)

Multiply 5.95 * 30
255 + -255r = 178.5

Solving
255 + -255r = 178.5

Solving for variable 'r'.

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

Add '-255' to each side of the equation.
255 + -255 + -255r = 178.5 + -255

Combine like terms: 255 + -255 = 0
0 + -255r = 178.5 + -255
-255r = 178.5 + -255

Combine like terms: 178.5 + -255 = -76.5
-255r = -76.5

Divide each side by '-255'.
r = 0.3

Simplifying
r = 0.3

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