Literal equations (SAT) practice

The simple interest formula is $I = Prt$, where $I$ is interest, $P$ is principal, $r$ is rate, and $t$ is time. Which equation correctly expresses $r$ in terms of $I$, $P$, and $t$?

The equation $y = mx + b$ is in slope-intercept form. Which equation correctly expresses $x$ in terms of $y$, $m$, and $b$?

The perimeter formula for a rectangle is $P = 2l + 2w$. Which equation correctly expresses $w$ in terms of $P$ and $l$?

The equation $ax + b = c$ relates values $a$, $b$, $c$, and $x$. Which equation correctly expresses $x$ in terms of $a$, $b$, and $c$?

The volume formula for a rectangular prism is $V = lwh$. Which equation correctly expresses $h$ in terms of $V$, $l$, and $w$?

The mean of $b$ and $c$ is $a$, so $a = \dfrac{b + c}{2}$. Which equation correctly expresses $c$ in terms of $a$ and $b$?

The formula $F = \dfrac{9}{5}C + 32$ converts a Celsius temperature $C$ to Fahrenheit $F$. Which equation correctly expresses $C$ in terms of $F$?

The point-slope form of a line is $y - k = m(x - h)$. Which equation correctly expresses $x$ in terms of $y$, $k$, $m$, and $h$?