Question

Tìm x:

X × 3 = 30

2 × x = 10

X : 4 = 5

Answer 1

- x × 3 = 30

X = 30 : 3

X = 10

- 2 × x = 10

X = 10 : 2

X = 5

- x : 4 = 5

X = 5 × 4

X = 20