Respuesta :

MrPOOH

Let the number be x in all those expressions.

15 - x = 20 - 7

or, x = 15 - 13 = 2

x + 2 = 16 + 3

or, x = 19 - 2 = 17

13 - 6 = x - 9

or, 7 + 9 = 16 = x

10 • 6 = 15 • x

or, 60/15 = 4 = x

10 ÷ x = 20 ÷ 4

or, 5 × 10 = 50 = x

18 • x = 16 • 9

or, x = 144 / 18 = 8

16 • 9 = 18 • x

or, x = 144 ÷ 18 = 8

10 ÷ 2 = x ÷ 2

or, x = 10 × 2 = 20

zarakabir710

Answer:

Let the number be x in all expressions.

15 - x = 20 - 7

or, x = 15 - 13 = 2

x + 2 = 16 + 3

or, x = 19 - 2 = 17

13 - 6 = x - 9

or, 7 + 9 = 16 = x

10 • 6 = 15 • x

or, 60/15 = 4 = x

10 ÷ x = 20 ÷ 4

or, 5 × 10 = 50 = x

18 • x = 16 • 9

or, x = 144 / 18 = 8

16 • 9 = 18 • x

or, x = 144 ÷ 18 = 8

10 ÷ 2 = x ÷ 2

or, x = 10 × 2 = 20

Step-by-step explanation:

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