Question

2-й номер а, б. Срочно.

Answer 1

1)
(1/3) в квадрате + х = (2/3) в квадрате × 2
(1/9) + х = (1/4) × 2
(1/9) + х = (1/2)
х = (1/2) - (1/9)
х = (7/18)
2)
1/2 × х + 1/3 × х =5/6
3х+2х=5
5х=5
х=1