Euzy, this is the solution to the problem:
• Tim's earnings per hour at Wendy's = $10
,
• Signing bonus = $ 30
,
• Total earnings of the week = $ 450
In consequence,
• Total earnings without the signing bonus = 450 - 30
,
• Total earnings without the signing bonus = 420
,
• Number of hours worked by Tim = 420/10
,
• Number of hours worked by Tim = 42