91Ó°ÊÓ

In the following exercises, solve.

$\frac{6}{x}+\frac{2}{3}=\frac{1}{y}fory$

In the following exercises, solve.

$\frac{m+3}{n-2}=\frac{4}{5}forn$

In the following exercises, solve.

$\frac{E}{c}=m^{2}forc$

In the following exercises, solve.

$\frac{3}{x}-\frac{5}{y}=\frac{1}{4}fory$

In the following exercises, solve.

$\frac{R}{T}=WforT$

In the following exercises, solve.

$r=\frac{s}{3-t}fort$

In the following exercises, simplify.

$\frac{v^2+8v+15}{v^2-v-12}$

In the following exercises, solve.

$c=\frac{2}{a}+\frac{b}{5}fora$

House Painting Alain can paint a house in 4 days. Spiro would take 7 days to paint the same house. Solve the equation

Ari can drive his boat 18 miles with the current in the same amount of time it takes to drive 10 miles against the current. If the speed of the boat is 7 knots, solve the equation$\frac{18}{7+c}=\frac{10}{7-c}$ for c to find the speed of the current.