One bead costs $
x. One marker costs $(
x + 15). One guide book costs $3
x.
- Ryan bought 7 beads, 3 markers and 1 guide book. How much did he spend? Simplify your answer in terms of x.
- If x = 10, how much did Ryan spend altogether?
(a)
Cost of 7 beads = 7 x
x = $7
x Cost of 3 markers = 3 x (
x + 15) = $(3
x + 45)
Cost of 1 guide book = $3
x Total amount that he spent
= 7
x + 3
x + 45 + 3
x= 7
x + 3
x + 3
x + 45
= $(13
x + 45)
(b)
If
x = 10,
total amount that he spent
= 13
x + 45
= (13 x 10) + 45
= 130 + 45
= $175
Answer(s): (a) $(13
x + 45) or $(45 + 13
x); (b) $175