6x - 2y = 4; (1,1) (2,4)
Show that the two ordered pairs are solutions to the given equation.
When I solved the soultions were 4, please help.
By solve the equation it means rewrite the equation so that y is by itself on one side of the equal sign and everything else is on the other side. Do that first, then plug in your ordered pairs (x,y).
this is what you are given
subtract from both sides
divide both sides by .
For the second ordered pair (2,4) plug the x-value (2) wherever you see x and see if you get the y-value (4).
.
To shown an ordered pair is a solution we need to evaluate and see if you get a true statement.
for the first one x=1 and y=1 so
So we simplify and see
so yes it is a solution.
For the next one x=2 y=4
So we simplify and see
so this is also a solution.
I hope this clears it up.
Good luck
B
Armygirl,
You are essentially checking to see if a point lies on a line equation.
Go here:
Determine if a point lies on a line
Try both points and it will show you the math work how to solve these proving that both points lie on the line.
Edit: I just saw i knowone's post just now.