4[9+10r]-4=-4

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Solution for 4[9+10r]-4=-4 equation: 


Simplifying
4[9 + 10r] + -4 = -4
[9 * 4 + 10r * 4] + -4 = -4
[36 + 40r] + -4 = -4

Reorder the terms:
36 + -4 + 40r = -4

Combine like terms: 36 + -4 = 32
32 + 40r = -4

Solving
32 + 40r = -4

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 + 40r = -4 + -32

Combine like terms: 32 + -32 = 0
0 + 40r = -4 + -32
40r = -4 + -32

Combine like terms: -4 + -32 = -36
40r = -36

Divide each side by '40'.
r = -0.9

Simplifying
r = -0.9

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