Solving literal equations

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Solving One-step Literal Equations
Solve each of the formulas for the indicated variable.
i) $a=bc$
for $c$ .
ii) $\frac{x}{y}=z$
for $x$ .
Solving Two-step Literal Equations
Solve each of the formulas for the indicated variable.
i) $p=3q+3r$
for $r$ .
ii) $r=2x+3xy$
for $x$ .
iii) $4=\frac{b-c}{2}$
for $b$ .
Solving Multi-step Literal Equations
Solve each of the formulas for the indicated variable.
i) $3(4x-y)=6$
for $x$ .
ii) $x=\frac{3y-z}{4}$
for $z$ .