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Posted by **ladybug Please Help!!** on Monday, June 18, 2012 at 8:51pm.

2x+2y=20

2x-2y=4

- Intermediate Algebra -
**bobpursley**, Monday, June 18, 2012 at 9:02pmadd the equations, and get...

4x=20 or x=5, then figure y

- Intermediate Algebra -
**ladybug Please Help!!**, Monday, June 18, 2012 at 10:23pm2x+2y=20

2x-2y=4

_________

4y= 16

y=16

2x+2(40)=20

2x+8=20

2x=12

x=6

(x,y)= (6,4)

Is this correct???

- Intermediate Algebra -
**Steve**, Tuesday, June 19, 2012 at 5:04amhow would one know whether the answer is correct?

Plug your values for x and y into both equations and see whether the equations hold.

In this case, your answer is correct.

**Answer this Question**

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