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Da Vinci Codes. Shirley Sides. 2006. x=7. 13 20 17 29. x+6= x+13= 2x+3= 2x+15=. y=12. 44 15 28 4. 3y+8= 2y-9= 4y-20= 2y/3=. x=4 y=6. 10 26 28 8 6. x+y= 2x+3y= x+4y= 2y-x= 3x-y=. x=9 What is y?. 4 2 7 32. x+y=13 2x+y=20 2x+y=25 3x+y=50. What is x and y?.
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Da Vinci Codes. Shirley Sides. 2006.
x=7 13 20 17 29 • x+6= • x+13= • 2x+3= • 2x+15=
y=12 44 15 28 4 • 3y+8= • 2y-9= • 4y-20= • 2y/3=
x=4 y=6 10 26 28 8 6 • x+y= • 2x+3y= • x+4y= • 2y-x= • 3x-y=
x=9 What is y? 4 2 7 32 • x+y=13 • 2x+y=20 • 2x+y=25 • 3x+y=50
What is x and y? • 2x+y=11 • x+3y=25 • 3x+y=27 • 2x+2y=22 • x+y=100
Could your make some codes up for a friend? • You can use any letter to stand for a number. • Don’t use more than 2 different letters. • Try some multiply and divide.