15(2r-0.3)+0.5(4r+3)=-64

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Solution for 15(2r-0.3)+0.5(4r+3)=-64 equation:


Simplifying
15(2r + -0.3) + 0.5(4r + 3) = -64

Reorder the terms:
15(-0.3 + 2r) + 0.5(4r + 3) = -64
(-0.3 * 15 + 2r * 15) + 0.5(4r + 3) = -64
(-4.5 + 30r) + 0.5(4r + 3) = -64

Reorder the terms:
-4.5 + 30r + 0.5(3 + 4r) = -64
-4.5 + 30r + (3 * 0.5 + 4r * 0.5) = -64
-4.5 + 30r + (1.5 + 2r) = -64

Reorder the terms:
-4.5 + 1.5 + 30r + 2r = -64

Combine like terms: -4.5 + 1.5 = -3
-3 + 30r + 2r = -64

Combine like terms: 30r + 2r = 32r
-3 + 32r = -64

Solving
-3 + 32r = -64

Solving for variable 'r'.

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

Add '3' to each side of the equation.
-3 + 3 + 32r = -64 + 3

Combine like terms: -3 + 3 = 0
0 + 32r = -64 + 3
32r = -64 + 3

Combine like terms: -64 + 3 = -61
32r = -61

Divide each side by '32'.
r = -1.90625

Simplifying
r = -1.90625

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