A school ordered $600 worth of lightbulbs. Some of the lightbulbs cost $1 each and the other cost $2 each. if twice as many $1 bulbs as $2 bulbs were ordered, how many lightbulbs were ordered altogether?

Question

anonymous · Answer

Please show how you got your answer!

anonymous · Answer

laptop is slow
put x = number of $2 light bulbs then since there are twice as may $1 light bulbs as $2 light bulbs  you know that the number of $1 light bulbs is 
$$2x$$ and then you get 
$$2x\times $1 +x\times $2 = $600$$

anonymous · Answer

$$4x=600$$
$$x=600\div 4$$
$$x=150$$ so 150 light bulbs that cost $2 and 300 light bulbs that cost $1