Kinsley is going to purchase some wrigting instruments at the store, mechanical pencils cost $1 and pens cost $2. She can spend up to $11, bit no more

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.