3r^2-16r=-5

Solution for 3r^2-16r=-5 equation:

Simplifying
3r2 + -16r = -5

Reorder the terms:
-16r + 3r2 = -5

Solving
-16r + 3r2 = -5

Solving for variable 'r'.

Reorder the terms:
5 + -16r + 3r2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + -16r + 3r2 = 0

Factor a trinomial.
(1 + -3r)(5 + -1r) = 0

Subproblem 1
Set the factor '(1 + -3r)' equal to zero and attempt to solve:

Simplifying
1 + -3r = 0

Solving
1 + -3r = 0

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

Add '-1' to each side of the equation.
1 + -1 + -3r = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -3r = 0 + -1
-3r = 0 + -1

Combine like terms: 0 + -1 = -1
-3r = -1

Divide each side by '-3'.
r = 0.3333333333

Simplifying
r = 0.3333333333
Subproblem 2
Set the factor '(5 + -1r)' equal to zero and attempt to solve:

Simplifying
5 + -1r = 0

Solving
5 + -1r = 0

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

Add '-5' to each side of the equation.
5 + -5 + -1r = 0 + -5

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

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

Divide each side by '-1'.
r = 5

Simplifying
r = 5
Solution
r = {0.3333333333, 5}