2) 4x + 8y = 20
-4x+2y=-30

(7,-1)

Step-by-step explanation:

4x + 8y = 20

-4x+2y=-30

Add the two equations together to eliminate x

4x + 8y = 20

-4x+2y=-30

10y = -10

Divide each side by 10

10y/10 = -10/10

y=-1

Now we need to find x

4x+8y = 20

4x+8(-1) = 20

Add 8 to each side

4x +8-8=20+8

4x = 28

Divide each side by 4

4x/4 =28/4

x =7

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.