Answer:
 

Explanation:
Given:
Bananas cost $1.50 per pound,
Guavas cost $3.00 per pound.
Kiran spends $12 on fruit for a breakfast.
Let b be the number of pounds of bananas Kiran buys.
Let g be the number of pounds of guavas Kiran buys.
Question asked: ( omitted to asked here )
a. Write an equation relating the two variables.
Solution:
Cost of banana per pound = $1.50
Cost of banana for 
 pound = $1.50
 pound = $1.50 
 
 
Similarly, Cost of guavas per pound = $3.00 
 Cost of guavas for 
 pound = $3.00
 pound = $3.00 

Now, 
Total money spent on fruits by Kiran = $12
Cost of banana for 
 pound + Cost of guavas for
 pound + Cost of guavas for 
 pound = $12
 pound = $12
The equation will be:-
 $1.50 
 +  $3.00
 +  $3.00 
 = $12
 = $12
