Question

Help! What is x and y!

Answer 1

x = -10

y = 3

Explanation:

2x + 4y = -8

-2x + 3y = 29

+__________

7y = 21 (then divide both sides by 7 to get y=3)

Plug 3 as y into the first equation:

2x + 4(3) = -8 (solve)

2x + 12 = -8 (subtract 12 from both sides)

2x = -20 (divide both sides by 2)

x = -10

Answer 2

x= -10, y= 3

Explanation:

2x+4y=-8

-2x+3y=29

Add these together to get...

7y=21 so y=3

Now plug in to get x.

2x+4(3)=-8

2x=-20

x=-10

Check with 2nd equation:

-2(-10)+3(3)=

20+9=29