x = 3 -inch bolts
y = 4 -inch bolts
James bought 24 bolts.
This mean x + y = 24
36 cents = $ 0.36
42 cents = $ 0.42
Total price = $ 9
This mean :
0.36 x + 0.42 y = 9
Now you must solve system :
x + y = 24
0.36 x + 0.42 y = 9
Try.
James bought 24 bolts at the hardware store for a total of $9.00. Some were 3−inch bolts that cost 36 cents each and the others were 4−inch bolts that cost 42 cents each. How many 3−inch bolts did James buy?
3 answers
15
0.36(18) + 0.42(6)
=6.48+2.52
=9.00
X (3-inch bolts)= 18
Y (4-inch bolts) = 6
=6.48+2.52
=9.00
X (3-inch bolts)= 18
Y (4-inch bolts) = 6