Respuesta :
Answer:
w = 25
Step-by-step explanation:
- 45+30 = 100 - w
- 75 = 100 - w
- w = 100 - 75
- w = 25
In order to work out “w”, you could begin by working backwards, starting with 100, then doing the inverse operation (subtracting 30 then subtracting 45).
100 - 30 = 70 - 45 = 25.
100 - 25 = 45 + 30
w = 25
100 - 30 = 70 - 45 = 25.
100 - 25 = 45 + 30
w = 25