Need those done by 33 minutes you have to use system of equations substitution thank you

1. y=4

y=x+7

4=x+7

x= -3 , y= 4

2. y=3x

y=x+5

3x=x+5

2x=5

x=5/2 or 2.5

y= 3(5/2)

y= 15/2 or 7.5

x= 2.5, 7= 7.5

1. x= -3           2. x= 5/2

Step-by-step explanation:

You need to substitute the second y equation given into the first one to find x. Then get x by itself on one side.

1. 4= x + 7

  -7       -7

  -3 = x

  x= -3

2. 3x= x + 5

   -x    -x

   2x= 5

  (2x= 5) /2

   x= 5/2

step-by-step explanation:

ok one would be money, and the other would be refreshments or something similar. if each bag of popcorn is 5.00 and each drink is half of that that means drinks are 2.50 the proper way to do that would to look and see how much of each you can buy without exceeding a limit of 30.00