Respuesta :

Answer:

30

Step-by-step explanation:

work in reverse:

10+7=17

17-12=5

5×7=35

35-5=30

LukeG1

Answer:

x = 30/7

Step-by-step explanation:

Unknown number = x

Write an equation

x + 5 ÷ 7 + 12 - 7 = 10

Simplify

x + 5/7 + 12 - 7 = 10

x + 5/7 + 5 = 10

x + 5/7 = 5

x = 30/7

Hope this helps :)