r(x)=-0.001x^2+0.04x+3.5

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Solution for r(x)=-0.001x^2+0.04x+3.5 equation: 


Simplifying
r(x) = -0.001x2 + 0.04x + 3.5

Multiply r * x
rx = -0.001x2 + 0.04x + 3.5

Reorder the terms:
rx = 3.5 + 0.04x + -0.001x2

Solving
rx = 3.5 + 0.04x + -0.001x2

Solving for variable 'r'.

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

Divide each side by 'x'.
r = 3.5x-1 + 0.04 + -0.001x

Simplifying
r = 3.5x-1 + 0.04 + -0.001x

Reorder the terms:
r = 0.04 + 3.5x-1 + -0.001x

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