4х – Зу = 15
x - 2y = 0 solve using substitution please show work

(6,3)

Step-by-step explanation:

I'm going to start with the second one.

x - 2y = 0

   +2y  +2y

x = 0 + 2y   which is the same as (x = 2y)

Now plug that in for the x-value in the other equation.

4(2y) - 3y = 15

8y - 3y = 15

5y = 15

Divide both sides by 5

y = 3

Here is where you are going to plug it back into the first one we did.

x - 2(3) = 0

x - 6 = 0

  +6   +6

x = 6

So the answer is (6,3)

Hope that helps and have a great day!

15 days

Step-by-step explanation:

So first we know that Amirah spends more money than Allison each day however, Allison has only 100 to 160. So first I would multiply it by 6 days so you would reduce 30 dollars from Allison's account then you reduce 60 dollars from Amirah's account. This would make it 70 and 100. Then we add another 3 days which would make them 52 and 70. Then we would add 2 more than we would have 40 and 50. Then add 4 more days. 10 and 10.

6+3+2+4=15

Henceforth, your answer would be 15 days.