You can switch the addition and subtraction signs to get q-(+5) =? So you want to find what 5 can be subtracted from to get 3, which is 8. 8+(-5) =3
4/x³ - (2x-1)/3x
= (4*3) - (2x-1)(x²) / 3x³
= (12 - 2x³ - x²) / 3x³
= -2x³ -x² + 12 / 3x³
The answer is C.
Hope it helps!
"x" would have to equal 1/2. You'd divide by 2 on both sides then simplify.