Question

I need help with this question please

Answer 1

11

Explanation:

hamburger = a

hot dog = b

cola = c

a + a + a = 30

3a = 30

3/3 a = 30/3

a = 10

10 + 2b + 2b = 18

4b = 18 - 10

4b = 8

4/4 b = 8/4

b = 2

2 * 2 - 2c = 2

4 - 2c = 2

-2c = 2 - 4

-2c = -2

-2/-2 c = -2/-2

c = 1

1 + 10 = 11