Asked by Anonymous

If (x,7) is a solition to the equation 5x-y=3, what is the value of x?
Answered by SAM
5X-Y=3
-5X -5X
-Y=3-5X
DIVIDE BY -1 ON BOTH SIDES
Y=-3+5X
PLUG IT IN PLUG IT IN
7=3-5(X)
SOLVE
SUBTRACT BY 3 ON BOTH SIDES 4=5X
AND DIVIDE BY -5 ON BOTH SIDES 4/5=5/5X
4/5=X
Answered by SAM
CORRRECTION!!!!
-4/5!
Answered by X
Here, all you have to do is substitute (7) for (y) in the equation. You can do this because all coordinates are of the form (x,y), and any number that is in the place of (y) in this format can be seen as equal to (y).
The working is shown below:
5x - (7) = 3
5x = 10
x = 2
As shown in the working above, x = 2 when y = 7.
There are no AI answers yet. The ability to request AI answers is coming soon!