15=r-5

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Solution for 15=r-5 equation:


Simplifying
15 = r + -5

Reorder the terms:
15 = -5 + r

Solving
15 = -5 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
15 + -1r = -5 + r + -1r

Combine like terms: r + -1r = 0
15 + -1r = -5 + 0
15 + -1r = -5

Add '-15' to each side of the equation.
15 + -15 + -1r = -5 + -15

Combine like terms: 15 + -15 = 0
0 + -1r = -5 + -15
-1r = -5 + -15

Combine like terms: -5 + -15 = -20
-1r = -20

Divide each side by '-1'.
r = 20

Simplifying
r = 20

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