Since he deposited 160 then took out 160 it did not change
Lets say you have 5x5. you would just add 5+5+5+5+5. To get a whole number for a fraction you have to do this. lets say you have 8/8 that would be equal to 8 circles and eight of those circles would be shaded in. 8/8 is one whole also 7/1 is a whole. It all depends on the problem you are trying to figure out
i hope my answer help you
1st=5x-100
2nd=1/3x-7
3rd=x²×4
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