SOLUTION: I need help with this systems problem. 7x^2 + y^2 = 64 x + y = 4 Thanks

Question 618242: I need help with this systems problem.
7x^2 + y^2 = 64
x + y = 4
Thanks
Answer by Maths68(1474) (Show Source): You can put this solution on YOUR website!
...........(1)
.................(2)
Take (2)

.....................(3)
Put the value of x from (3) to (1)
...........(1)

Divide by 8 both sides of the above equation

Now solve for y

Or
Or
Put the values of y in (3)
.....................(3)
y=6

y=1

Solution set (x,y)=(-2,6),(3,1)

Check
======
Put the values of x and y in either equation (1) or (2)
When(x,y)=(-2,6)
...........(1)

When(x,y)=(3,1)
...........(1)

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