# system of equations

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#### Storyboard Text

• We have \$42 in total to spend in the toy store, we have 22 bills in total.
• All of our bills are either \$5 or \$1 bills.﻿
• We need your help to help us figure out how many 5 dollar bills and 1 dollar bills we have﻿
• But don't worry I have a friend that will help you figure it out!﻿
• So first your going to want to set up and equation to help you solve this!!!﻿
• your going to be using substitution to figure out this problem.
• Hint x= 5 dollar bills and f= 1 dollar bills ﻿
• Now you'll need another equation to help you find the variable in the first one﻿
• Here's a hint the equation is x+f=22!! move that around and then plug it into the first equation ﻿
• you're equation should be 5x+1f=42﻿
• You should have gotten f=17, which mean I have 17 1 dollar bills. wow you're super smart.﻿
• One you plug it in you'll combine common variable and then divide to find x ﻿
• WOW you're right I have 5 5 dollar bills ﻿
• Now that you have found f you can plug that back into the second equation which should give you x+17=22﻿
• Look you did it thanks for helping me solve this problem.﻿
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