47=8r+15

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Solution for 47=8r+15 equation:


Simplifying
47 = 8r + 15

Reorder the terms:
47 = 15 + 8r

Solving
47 = 15 + 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.
47 + -8r = 15 + 8r + -8r

Combine like terms: 8r + -8r = 0
47 + -8r = 15 + 0
47 + -8r = 15

Add '-47' to each side of the equation.
47 + -47 + -8r = 15 + -47

Combine like terms: 47 + -47 = 0
0 + -8r = 15 + -47
-8r = 15 + -47

Combine like terms: 15 + -47 = -32
-8r = -32

Divide each side by '-8'.
r = 4

Simplifying
r = 4

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