Answer :
$315 will be substituted into your equation for b
315 = 80 + (25 + 9)w
315 = 80 + 34w
Subtract 80 from both sides
235 = 34w
Divide both sides by 34
w = 6.9117
So I would answer 7 weeks.
315 = 80 + (25 + 9)w
315 = 80 + 34w
Subtract 80 from both sides
235 = 34w
Divide both sides by 34
w = 6.9117
So I would answer 7 weeks.