40=r(8)

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Solution for 40=r(8) equation:


Simplifying
40 = r(8)

Reorder the terms for easier multiplication:
40 = 8r

Solving
40 = 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
40 + -8r = 8r + -8r

Combine like terms: 8r + -8r = 0
40 + -8r = 0

Add '-40' to each side of the equation.
40 + -40 + -8r = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -8r = 0 + -40
-8r = 0 + -40

Combine like terms: 0 + -40 = -40
-8r = -40

Divide each side by '-8'.
r = 5

Simplifying
r = 5

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