-4,-3,-2,-1,0
which means 4 numbers
2/5+3/8= 31/40 therefore he still has 9/40 to go.
to get this you multiply the two denominators together
5x8=40 which is your denominator
then you cross multiply the two numerators
2x8=16
3x5=15
to get the final
15/40+16/40=31/40
and you are left with 9/40
N = 15
First you would add 5 to both sides.
Then you would Multiply 3 on both sides to get N by itself
By multiplying 3 x 5 it gives you 15
So N = 15
