<em><u>Question:</u></em>
At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?
<em><u>Answer:</u></em>
Cost of 7 bulbs is $ 12.6
<em><u>Solution:</u></em>
Given that,
5 light bulbs cost $ 9
Find the cost of 1 bulb
Cost of 1 bulb is found by dividing the cost of 5 bulbs by 5
Thus cost of 1 bulb is $ 1.8
<h3><u>Find the cost of 7 bulbs:</u></h3>
Thus cost of 7 bulbs is $ 12.6