ANGELINA C. answered • 10/02/18

Tutor

5
(49)
Your Patient, Dependable, and Knowledgeable Math Tutor

Let x = be the number of nickels that Erin has

x + 3 = be the number of dimes that Erin has

0.05x + 0.10 ( x + 3 ) = 1.20

Solve for x: Multiply both sides of the equation by 100 to eliminate two decimal places

5x + 10x + 30 = 120

15x = 90

x = 6 ; Erin has 6 nickels

x + 3 = 9 ; Erin has 9 dimes

To check: 6 ( 0.05 ) + 9 ( 0.10 ) = 0.30 + 0.90 = 1.20