Question

(158-x)x7=21

Answer 1

(158 - x) × 7 = 21

158 - x = 21 : 7

158 - x = 3

x = 158 - 3

x = 155

Vậy x = 155

Answer 2

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Answer 3

158 - x = 21 : 7 = 3 

158 -3 =x= 155

Answer 4

(158-x)x7=21

(158-x)=21:7

158-x=3

x=158-3

x=155

Answer 5

158-x=21÷7 158-x=3 X=158-3 X=155