First grade problem
Level
1
x+y=15 and x-y=5 x=10 y=? What is y?
4
5
13
3
6
11
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1 solution
First, find an easier way. If 10+ =15 and 10- =5 what is _? Try 5 because, 10+5=15 then 10-5=5 right? Yes, so 4 is the right answer. :) YaY