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*5y
y=(√4+1) / (√15*5)
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