Question 572820
2/y + 2/(y-3)=1.4

2y-6+2y=1.4

4y-6=7/5(y(y-3)

5(4y-3)=7y^2-21y
20y-30=7y^2-21y

7y^2-41y+30=0

a=	7	,	b=	-41	,	c=	30	
								
b^2-4ac=	1681	+	-840					
b^2-4ac=	841		{{{	sqrt(	841	)=	29	}}}
{{{x=(-b+-sqrt(b^2-4ac))/(2a)}}}								
{{{x1=(-b+sqrt(b^2-4ac))/(2a)}}}								
x1=(	41	+	29	)/	14			
x1=	5.00							
x2=(	41	-29	) /	14				
x2=	0.86							


speed with current = 5 mph
speed against = 2 mph