5 times y is the same as 5y in algebra
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5 times ten is fifty JHC
If 5y = 4 then y = 4/5 or 0.8
If: x = -5 Then: y = (3*-5)-1 = -16
y = 2x + 5 17 = 2x + 5 X = 6
Your question is like this:X+Y=15, X-Y=5, (X x Y)-X+Y= ?According to my calculations, X=10 and Y=5, therefore (X x Y)-X+Y= 45.