-2(9r+9)+10(8r+3)=

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Solution for -2(9r+9)+10(8r+3)= equation:


Simplifying
-2(9r + 9) + 10(8r + 3) = 0

Reorder the terms:
-2(9 + 9r) + 10(8r + 3) = 0
(9 * -2 + 9r * -2) + 10(8r + 3) = 0
(-18 + -18r) + 10(8r + 3) = 0

Reorder the terms:
-18 + -18r + 10(3 + 8r) = 0
-18 + -18r + (3 * 10 + 8r * 10) = 0
-18 + -18r + (30 + 80r) = 0

Reorder the terms:
-18 + 30 + -18r + 80r = 0

Combine like terms: -18 + 30 = 12
12 + -18r + 80r = 0

Combine like terms: -18r + 80r = 62r
12 + 62r = 0

Solving
12 + 62r = 0

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 62r = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 62r = 0 + -12
62r = 0 + -12

Combine like terms: 0 + -12 = -12
62r = -12

Divide each side by '62'.
r = -0.1935483871

Simplifying
r = -0.1935483871

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