Can someone me out with this? i''m not understanding how to solve these.
2y-4x=20
y+4x=1

x = -1.5 and y = 7.

Step-by-step explanation:

2y - 4x = 20

y + 4x = 1

We solve by elimination. (Note that -4x + 4x = 0 so if we add the 2 equations the terms in x disappear):

Adding:

3y + 0 = 21

y = 21 /3 = 7

Now, to find the value of x we substitute   y = 7 into the first equation and solve for x:

2y - 4x = 20

2(7) - 4x = 20

-4x = 20 - 14 = 6

x = 6/-4

x = -1.5

To check if  our answer is correct we substitute in the second equation:

y + 4x = 1

7 + 4(-1.5) = 7 - 6 = 1.  Correct.

where does the z at is it on the x axes or on the y axes any way if it is on the y axes put it horizontally and if it is on the x axes put it vertically