` 50 + 42 : x = 56 `
` 42 : x = 56-50 `
` 42 : x = 6 `
` x =42 : 6 `
` x =7 `
Đáp án:
50 + 42 : x = 56
42 : x = 56 - 50
42 : x = 6
x = 7
Choose the excessive word in the sentence below.