From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$9\mathrm{x}+5=4$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$6\mathrm{y}-2=3$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$\frac{4\mathrm{x}}{3}=5$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$8\times 4-5\times 2=22$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$\frac{4\mathrm{s}}{5}=6$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$\frac{9\mathrm{b}}{2}>5$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$\frac{8}{5}\times 30=60+4$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$9\mathrm{x}=81$

From the following linear equation, state which one of them are equation with a variable. Also, identify the variable in the equation.

$5\mathrm{m}<20$