y=20x and y=5x+2

Question

I need to solve these using the substitution, addition, or elimination method. Whatever works.

Answer 1

y = 20x

 

y = 5x+2

 

Since y = y, just set 20x equal to 5x+2 and solve for x:

 

20x = 5x+2

 

15x = 2

 

x = 2/15

 

Check:

y = 20x = 20(2/15) = 40/15 = 8/3

y = 5x + 2 = 5(2/15) + 30/15 = 10/15 + 30/15 = 40/15 = 8/3