2r-9ifr=4

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Solution for 2r-9ifr=4 equation: 


Simplifying
2r + -9ifr = 4

Reorder the terms:
-9fir + 2r = 4

Solving
-9fir + 2r = 4

Solving for variable 'f'.

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

Add '-2r' to each side of the equation.
-9fir + 2r + -2r = 4 + -2r

Combine like terms: 2r + -2r = 0
-9fir + 0 = 4 + -2r
-9fir = 4 + -2r

Divide each side by '-9ir'.
f = -0.4444444444i-1r-1 + 0.2222222222i-1

Simplifying
f = -0.4444444444i-1r-1 + 0.2222222222i-1

Reorder the terms:
f = 0.2222222222i-1 + -0.4444444444i-1r-1

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