Question

Решите пропорцию:
45 : 5x = 9 : 4

Answer 1

45:5x=9:4
9:x=9:4
x=4
45/20=9/4
2,25=2,25

Answer 2

45 : 5x = 9 : 4
5x * 9 = 45 * 4
45x = 180
x = 180 : 45
x = 4