Question

1) 90÷х=45÷5
2) 36÷y=40÷10

Answer 1

$90 \div x = 45 \div5 \\ 90 \div x = 9 \\ x = 90 \div 9 \\ x = 10 \\ \\ 36 \div y = 40 \div 10 \\ 36 \div y = 4 \\ y = 36 \div 4 \\ x = 9$

Answer 2

№ 1.

Решение.

90 : x = 45 : 5

90 : x = 9

x = 90 : 9

x = 10

Ответ: x = 10

№ 2.

Решение.

36 : у = 40 : 10

36 : у = 4

у = 36 : 4

у = 9

Ответ: у = 9