So it’s simple. We know he gets $6 every week. Spent $90 and has $48 left. So 90+48=138. That’s how much he had saved. Now divide it by 6 to find out how many weeks he’s been saving to gg $138. 138/6=23.
Lamar has been saving for 23 weeks.
I hope this helped, if it did, I would appreciate it if you could’ve give brainliest