Question

Y dikurang 1 per 3 sama dengan 3 dalam kurung y kurang 3 per 7

Answer 1

Y-1/3=3(y-3/7)
y-1/3=3y-9/7
____________ . 21 (dikali 21)
21y-7=63y-27
21y-63y=-27+7
-42y=-20
y=-20/-42
y=10/21

Answer 2

Y - 1/3 = 3(y-3/7)
y - 1/3 = 3y - 9/7
y - 3y = 1/3 - 9/7
y - 3y = 7/21 - 27/21
- 2y = - 20/21
y = 20/21 x 1/2
y = 20/42
y = 10/21