Question 48835
LEt x represent the speed of the boat
EQUATION:
{{{5/(x-4)-5/(x+4)=2/3}}}
{{{5((x+4)-(x-4))=(2((x+4)(x-4)))/3}}}
{{{5(8)=(2(x^2-16))/3}}}
{{{40=(2x^2-32)/3}}}
{{{120=2x^2-32}}}
x=8.7
Hence, the speed of the boat is 8.7mph
Paul.