Its a simultaneous equation:
lets make "x" the used games and "y" the new ones
4x + 2y = 84
6x + y = 78. (multiply this by 2 to cancel out y)
12x + 2y = 156
so now we subtract them:
12x - 4x = 156 - 84
x = 9
used games cost $9
new games cost 78 - 6(9) = $24
Janet has $120 but she already bought 3 NEW games so:
120 - 3(24) = $48 left
48/9 = how many used ones she can buy = 5. something
she can buy 5 used
Answer:
$0.64 per book
Step-by-step explanation:
Answer:
15.6
step by step explanation:
5-44• (-0.75) - 18 ÷ 2/3 • 0.8 + (-4/5)
= 5 + 33 - 27*0.8 - 0.8
= 5 + 33 -21.6 - 0.8
= 15.6.
Answer:
sorry I don't understand
Step-by-step explanation:
5/6 = .83333333333333333333333333.... It goes on...
.833333333333333333 * 18 = 15
15 is your answer
Another way you could do it is 18/6 = 3
3+3+3+3+3 = 15
3 being 1/6th of 18 *Hope This Helps...*
