Bob is having a birthday party and buys 2 pizzas. His sister Catherine eats 1/5 and Bob eats the same amount as her. How much of the pizza is left over for all the guests?
It costs $3.25 for every pound of candy you buy
Answer:
Carros = 20
Motos = 30
Step-by-step explanation:
Carros = x
Motos = y
x + y = 50
4x + 2y = 140
x = 50 - y
4 (50-y) + 2y = 140 (substitución)
200 - 4y + 2y = 140
- 2y = 140 - 200
y = -60/-2
y = 30
x + 30 = 50
x = 50-30
x = 20
Answer:
third option
Step-by-step explanation:
set all the x's equal to zero