Asked by joshua

90 marbles are shared among 3 friends. Dave gets 10 more than Lall, who gets 10 more than lee. How much does dave get?
Answered by Ms. Sue
I'll be glad to check your answer.

Answered by joshua
40
Answered by Ms. Sue
If Dave gets 40, then Lall gets 30, and Lee gets 20.

Yep, that checks!

Answered by joshua
thank u Ms. Sue
Answered by Ms. Sue
You're welcome, Joshua.

Answered by Reiny
method:
lee ---- x
lal ---- x+10
dave --> (x+10) + 10 = x+20

x + x+10 + x+20 = 90
3x = 60
x = 20

etc