2(10-2y)+y((3/7)/(9/10))=22

Answer 1

(3/7)/(9/10) = 3/7 * 10/9 = 30/63 = 10/21

2(10-2y) = 20-4y

20 - 4y + 10/21y = 22

multiply both sides by 21.

420 - 84y + 10y = 462

Combine terms and solve.