8-5r+16=-21

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Solution for 8-5r+16=-21 equation:


Simplifying
8 + -5r + 16 = -21

Reorder the terms:
8 + 16 + -5r = -21

Combine like terms: 8 + 16 = 24
24 + -5r = -21

Solving
24 + -5r = -21

Solving for variable 'r'.

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

Add '-24' to each side of the equation.
24 + -24 + -5r = -21 + -24

Combine like terms: 24 + -24 = 0
0 + -5r = -21 + -24
-5r = -21 + -24

Combine like terms: -21 + -24 = -45
-5r = -45

Divide each side by '-5'.
r = 9

Simplifying
r = 9

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