the price of chocolate is less than the price of an ice cream.the product of cost of 2 ice and 1 chocolateis 100.what is the cost of each chocolate

Question

explain me short method

Answer 1

Assuming the chocolate is at least 1.00 less than the ice cream:

 

Let x = price of chocolate

Let x+1 = price of ice cream

 

2(x+1) + x = 100

2x + 2 + x = 100

3x = 98

x = 32.66

 

Check

2(32.66+1) + 32.66 = 100

99.98 = 100 (close enough, discrepancy due to rounding error)