Question

função inversa de y=3x/4-x

Answer 1

$y = \dfrac{3x}{4-x}\\\\ y\left(4-x\right) = 3x\\\\ 4y-yx = 3x\\\\ 4y = 3x + yx\\\\ trocando\;\;\ de\;\; lado\\\\ 3x+yx = 4y\\\\ x(3+y) = 4y\\\\ x = \dfrac{4y}{3+y} \\\\\\ trocando x por y (substituindo)\\\\\\ y = \dfrac{4x}{3+x}$