-10(8r+9)+9(6r+6)=

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Solution for -10(8r+9)+9(6r+6)= equation:


Simplifying
-10(8r + 9) + 9(6r + 6) = 0

Reorder the terms:
-10(9 + 8r) + 9(6r + 6) = 0
(9 * -10 + 8r * -10) + 9(6r + 6) = 0
(-90 + -80r) + 9(6r + 6) = 0

Reorder the terms:
-90 + -80r + 9(6 + 6r) = 0
-90 + -80r + (6 * 9 + 6r * 9) = 0
-90 + -80r + (54 + 54r) = 0

Reorder the terms:
-90 + 54 + -80r + 54r = 0

Combine like terms: -90 + 54 = -36
-36 + -80r + 54r = 0

Combine like terms: -80r + 54r = -26r
-36 + -26r = 0

Solving
-36 + -26r = 0

Solving for variable 'r'.

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

Add '36' to each side of the equation.
-36 + 36 + -26r = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -26r = 0 + 36
-26r = 0 + 36

Combine like terms: 0 + 36 = 36
-26r = 36

Divide each side by '-26'.
r = -1.384615385

Simplifying
r = -1.384615385

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