Question

реши уравнение y×9 = 99; 189÷ a=3

Answer 1

y×9 = 99

y=99:9

y=11

189÷ a=3

a=189:3

a=63

Answer 2

$y \times 9 = 99 \\ 9y = 99 \\ y = 11 \\ 189 \div a = 3 \\ a = 189 \div 3 \\ a = 63$