15=4r-1

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Solution for 15=4r-1 equation:


Simplifying
15 = 4r + -1

Reorder the terms:
15 = -1 + 4r

Solving
15 = -1 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
15 + -4r = -1 + 4r + -4r

Combine like terms: 4r + -4r = 0
15 + -4r = -1 + 0
15 + -4r = -1

Add '-15' to each side of the equation.
15 + -15 + -4r = -1 + -15

Combine like terms: 15 + -15 = 0
0 + -4r = -1 + -15
-4r = -1 + -15

Combine like terms: -1 + -15 = -16
-4r = -16

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

Simplifying
r = 4

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