Răspuns:
Explicație pas cu pas:
7*(2x - 3y) = 8*(x - 2y)
14x - 21y = 8x - 16y
14x - 8x = 21y - 16y
6x = 5y
x = 5y/6
__________
3x + y = 3*5y/6 + y = 5y/2 + y = 5y/2 + 2y/2 = 7y/2
4y - 3x = 4y - 3*5y/6 = 4y - 5y/2 = 8y/2 - 5y/2 = 3y/2
(7y/2) / (3y/2) = 7/3