Translate the statement into an equation.

"The length ($L$L) of a box is nine times the width ($W$W)."

"The weight of a human ($H$H) is seven times the weight of a greyhound ($G$G)."

"The length ($L$L) of a swimming pool is triple the width ($W$W)."

"The revenue ($R$R) of a company is double the cost ($C$C)."

Determine the value of a variable in the first degree, using a formula