One bead costs $
x. One marker costs $(
x + 15). One colouring book costs $3
x.
- Seth bought 4 beads, 3 markers and 1 colouring book. How much did he spend? Simplify your answer in terms of x.
- If x = 7, how much did Seth spend altogether?
(a)
Cost of 4 beads = 4 x
x = $4
x Cost of 3 markers = 3 x (
x + 15) = $(3
x + 45)
Cost of 1 colouring book = $3
x Total amount that he spent
= 4
x + 3
x + 45 + 3
x= 4
x + 3
x + 3
x + 45
= $(10
x + 45)
(b)
If
x = 7,
total amount that he spent
= 10
x + 45
= (10 x 7) + 45
= 70 + 45
= $115
Answer(s): (a) $(10
x + 45) or $(45 + 10
x); (b) $115