It goes 2, 4, 10, 20 euros
(1,2)
(2,4)
(5,10)
(10,20)
Answer:
17-1/4y
Step-by-step explanation:
Answer:

Step-by-step explanation:

X - y = 5,
x = 5 + y
substitute (x = 5 + y) into the first equation,
5 + y + 2y = -1
3y = -6
y = -2,
substitute y = -2 into (x - y = 5),
x + 2 = 5
x = 3
Hence, x = 3, y = -2
No: 6(-5) +5 = 5(-5) +8 + 2(-5)
-30 + 5 = =25 + 8 - 10
-25 ≠ -27