Question

помогите пожалуйста
90*y=15*60
x-25=640:8

Answer 1

90у = 15 • 60

90у = 900

y= 10

Answer 2

1)

$90 \times y = 15 \times 60\\ 90y = 900 \\ y = 10$

2)

$x - 25 = 640 \div 8 \\ x = 80 - 25 \\ x = 55$