mystery box se.4 systems of equations. launch recall how you solved “coin quandary” 2
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Mystery Box
SE.4 Systems of Equations
2
LAUNCHRecall how you solved “Coin Quandary”
Mystery BoxYou will get a box with two
types of erasers.• Star erasers that cost 4¢
each• Pencil top erasers that
cost 3¢ each
DO NOT OPENYOUR MYSTERY BOX
Mystery Box
Mystery BoxWork individually.
Mystery BoxCompare with a partner.
Mystery Box
Let’s share.
What is your solution to the mystery?
Mystery Box
It’s time to solve the mystery.Were you right?
OPEN YOUR MYSTERY BOX
©Evergreen Public Schools 2010
9
DebriefIn the system of equations, you wrote two equations.
• What does each equation count?
• When defining your variables, you need to be more specific than “x = star erasers”. What do you need to add to your definition of x?
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