Answer:
A) X + Y = 12
B) 10Y + x = 10x + Y -18
B) 9Y = 9x -18 multiplying A) by -9
A) -9Y = 9x - 72 adding A and B we get
0 = 18x -90
x = 5
The number is 75
Double-Check
7 + 5 = 12
75 -57 = 18
Step-by-step explanation:
0.12 x 70 = 8.4
12% of 70 is 8.4
For $25 exactly is 8.3 cookies (recurring 3) but that is highly unrealistic, so over 25 dollars is 9 cookies (for 27 dollars) at the very least.
