Algebra1
posted by Samantha .
Sally bought some ordinary pencils and 4 times as many special pencils. Each ordinary pencil cost $0.20 and each special pencil cost $0.35. She spent $14.40. How many of each pencil did she buy?
Please show me how you got your answer. Thank you.

Suppose sally bought x no of ordinary prencils.
Therefore, she 4x no of special pencils.
Expenditure on ordinary pencil = $0.20*x
Expenditure on special pencils = $0.35*4x
o.20*x+ 0.35*4x = 14.40
x= 26
so she bought 26 ordinary pencil and 4*26=104 special pencil. 
thanks for your help!