MATH
posted by Tony on .
I NEED TO SOLVE FOR Y AND X
im getting rele confused on this. ok here is the prob.
x+y=5
x2y=4
equation 1 x+y=5
equation 2 x2y=4
Multiply equation 1 by 1.
Add equation 1 to equation 2. The x term cancels. Solve for y.
THEN, put the value of y into either equation and solve for x.
Finally, put the value of x and y into the OTHER equation and see if those values satisfy the equation.

Multiplying Equation 1 by 1 you get:
xy=5
Adding that to equation 2 you get:
x y = 5
+ x 2y = 4

3y = 9
Divide both sides by 3 and you get
y=3
Put that back into either equation and you can solve for x
x+y=5
x+3=5
x+33=53
x=2
So x=2, y=3 should be the solutions.
Check this in the other equation, x2y=4
22(3) = 4
26 = 4 why yes it does! :)