1) y=√4+y + 1/√15-5y
2)16/x^2-16 + x/x+4 = 2/x-4
3)60/10-x - 60/x = 5
4)1/x-1 + 1/x^2-1 = 5/8

1) y=√4+y + 1/√15-5y√4+√15/15=5y(√60+√15)=5y*15=75y√15(√4+1)=75y√4+1=√15*5yy=(√4+1) / (√15*5)2)16/x^2-16 + x/x+4 = 2/x-43)60/10-x - 60/x = 54)1/x-1 + 1/x^2-1 = 5/8