Intermediate Algebra
posted by ladybug Please Help!! on .
Solve using elimination method. If the system has no system or infinite number of solutions, state this. Please show all work. I need to show how I came about my answer. I need this as soon as possible please. I would appreciate any and all help!!
2x+2y=20
2x2y=4

add the equations, and get...
4x=20 or x=5, then figure y 
2x+2y=20
2x2y=4
_________
4y= 16
y=16
2x+2(40)=20
2x+8=20
2x=12
x=6
(x,y)= (6,4)
Is this correct??? 
how 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.