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My professor posed a question for microecon stating: Demand: Qd=100-2p Supply: Qs=8p. He said to compute...

My professor posed a question for microecon stating: Demand: Qd=100-2p Supply: Qs=8p. He said to compute equilibrium price and quantity from this, and his answers ended up being: Qs=Qd-> 8p=100-2p->10p=100->P=100/10=10 Q=8 x 10=80. I'm unsure how he got 10p earlier in the computation or how he solved the question in general.

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