A school ordered $600 worth of light bulbs. Some of the light bulbs cost $1 each and the others cost $2 each. If twice as many $1 bulbs as $2 bulbs were ordered, how many light bulbs of each type were ordered?

A school ordered 300 bulbs that cost $1 and 150 bulbs that cost $2.

Step-by-step explanation:

Let denotes number of light bulbs that cost $1 and denotes number of light bulbs that cost $2.

Twice as many $1 bulbs as $2 bulbs were ordered.

A school ordered $600 worth of light bulbs.

Put in

Put in

Therefore,

A school ordered 300 bulbs that cost $1 and 150 bulbs that cost $2.

one that is bigger than 3 1/2