Answer:
x=7 x=-1
Step-by-step explanation:
he saves $860 per month
calculate each of his outgoings
rent = × $3600 = = $900
food = × $3600 = = $1440
activities = × $3600 = = $400
savings = $3600 - ( 900 + 1440 + 400 ) = $860
Three point zero five one.