The price per unit, P, and the demand, x for a particular material are related by the linear equation p=120- 6/7x while the supply is given by the...

The price per unit, P, and the demand, x for a particular material are related by the linear equation p=120- 6/7x while the supply is given by the linear equation p=6/7x as shown in the given figure. At what value of p does supply equal demand? At p=. Supply equals demand.