-2(5r+6)+5(r-9)=

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Solution for -2(5r+6)+5(r-9)= equation:


Simplifying
-2(5r + 6) + 5(r + -9) = 0

Reorder the terms:
-2(6 + 5r) + 5(r + -9) = 0
(6 * -2 + 5r * -2) + 5(r + -9) = 0
(-12 + -10r) + 5(r + -9) = 0

Reorder the terms:
-12 + -10r + 5(-9 + r) = 0
-12 + -10r + (-9 * 5 + r * 5) = 0
-12 + -10r + (-45 + 5r) = 0

Reorder the terms:
-12 + -45 + -10r + 5r = 0

Combine like terms: -12 + -45 = -57
-57 + -10r + 5r = 0

Combine like terms: -10r + 5r = -5r
-57 + -5r = 0

Solving
-57 + -5r = 0

Solving for variable 'r'.

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

Add '57' to each side of the equation.
-57 + 57 + -5r = 0 + 57

Combine like terms: -57 + 57 = 0
0 + -5r = 0 + 57
-5r = 0 + 57

Combine like terms: 0 + 57 = 57
-5r = 57

Divide each side by '-5'.
r = -11.4

Simplifying
r = -11.4

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