4+9(-5r-4)=

Solution for 4+9(-5r-4)= equation:

Simplifying
4 + 9(-5r + -4) = 0

Reorder the terms:
4 + 9(-4 + -5r) = 0
4 + (-4 * 9 + -5r * 9) = 0
4 + (-36 + -45r) = 0

Combine like terms: 4 + -36 = -32
-32 + -45r = 0

Solving
-32 + -45r = 0

Solving for variable 'r'.

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

Add '32' to each side of the equation.
-32 + 32 + -45r = 0 + 32

Combine like terms: -32 + 32 = 0
0 + -45r = 0 + 32
-45r = 0 + 32

Combine like terms: 0 + 32 = 32
-45r = 32

Divide each side by '-45'.
r = -0.7111111111

Simplifying
r = -0.7111111111