Write an expression for 267 multiplied by x

new to expressions, if you can a explanation is greatly appreciated. if not that completely fine!

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

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.