-5(2r-.3)+5(4r+3)=-64

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Solution for -5(2r-.3)+5(4r+3)=-64 equation: 


Simplifying
-5(2r + -0.3) + 5(4r + 3) = -64

Reorder the terms:
-5(-0.3 + 2r) + 5(4r + 3) = -64
(-0.3 * -5 + 2r * -5) + 5(4r + 3) = -64
(1.5 + -10r) + 5(4r + 3) = -64

Reorder the terms:
1.5 + -10r + 5(3 + 4r) = -64
1.5 + -10r + (3 * 5 + 4r * 5) = -64
1.5 + -10r + (15 + 20r) = -64

Reorder the terms:
1.5 + 15 + -10r + 20r = -64

Combine like terms: 1.5 + 15 = 16.5
16.5 + -10r + 20r = -64

Combine like terms: -10r + 20r = 10r
16.5 + 10r = -64

Solving
16.5 + 10r = -64

Solving for variable 'r'.

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

Add '-16.5' to each side of the equation.
16.5 + -16.5 + 10r = -64 + -16.5

Combine like terms: 16.5 + -16.5 = 0.0
0.0 + 10r = -64 + -16.5
10r = -64 + -16.5

Combine like terms: -64 + -16.5 = -80.5
10r = -80.5

Divide each side by '10'.
r = -8.05

Simplifying
r = -8.05

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