Question

Folosind proportii derivate, determinati numarul rational x dacă:
a) x/2x+3=4/3
b) 3x/x+1/3 =4/3
Vă rog este urgent!!

Answer 1

a) x/ (2x+3) = 4/3 => 3x = 8x + 12 => 5x = -12 => x = -12/5

b) 3x / (x+1/3) = 4/3 => 9x = 4x + 4/3 => 27x = 12x + 4 => 15x = 4 => x =4/15