-7y-4x=17y-2x=53
-4x=24y-2x=53
-2x=24y=53
24y+2x=53
You would have to solve one at a time.
y=53/24
y=2.21
x=53/2
x=26.5
Number 1 and number 3 are the same because if you are purchasing three tires that is 75% off the tires you need and one of them you get free. the free one becomes the overall discount of 25% off. number 3 is the same, the one quarter represents 25% off of the purchase.
Yo got to the calculator click scientific then click 9 the go to the left side where all the x's are then click the one that looks like the y is on the top right next to the x and then click 6 and then click enter and then you get 531441
It would take 20 hours
300/15= 20
