Fifteen of the Most Important Dates in American History
Solve the fifteen problems involving systems of equations and place the answer next to each letter.
There are thirty-one answers labeled A through Z and then a through e.
Then fill in the forty-five blanks with the numbers corresponding to each letter.
This will give you the fifteen important dates.
Then you must write a description of what happened on each date.
Problem #1
A = _____ 2A - B = 30
B = _____ A + B = 57
Problem #2
C = _____ 8C + 3D = 40
D = _____ 5C - 2D = -6
Problem #3
E = _____ E + F = 13
F = _____ 15E - F = 3
Problem #4
G = _____ H = 2G - 1
H = _____ 3G + 2H = 68
Problem #5
I = _____ J = 85I + 163
J = _____ 93I - J = - 3
Problem #6
K = _____ K + L = 1951
L = _____ K - L = 1907
Problem #7
M = _____ M - 13N = 1930
N = _____ 2M + 5N = 4015
Problem #8
O = _____ O + P = 20
P = _____ O - P = 2
Problem #9
Q = _____ R = Q + 1930
R = _____ R - 73Q = 922
Problem #10
S = _____ S - T = 74
T = _____ 3T - 2S = 1717
Problem #11
U = _____ V - 327U = 6
V = _____ V - U = 1962
Problem #12
W = _____ X + W = 1976
X = _____ 2X - 300W = 1838
Problem #13
Y = _____ Z = 452Y + 133
Z = _____ 3Z - 1050Y = 1623
Problem #14
a = _____ a - b = 187
b = _____ 19b - 17a = 373
Problem #15
c = _____ d + e - 2c = 798
d = _____ 3d + c -3e = 1637
e = _____ 5e +8c -11d = 740
Now fill in the forty-five blanks below and on the next page with the
numbers corresponding to each letter, and describe the event for that date.
___/___/______ : __________
W Y b
___/___/______ : __________
O L a
___/___/______ : __________
F W Z
___/___/______ : __________
D B a
___/___/______ : __________
P E S
___/___/______ : __________
G A K
___/___/______ : __________
N U c
Note: This date is the Old Date
from the Julian Calendar (before
1752). If you use the Gregorian
Calendar, then the date would be:
N / Q / c
___/___/______ : __________
Y H M
___/___/______ : __________
Y Y V
___/___/______ : __________
U U R
___/___/______ : __________
E E J
___/___/______ : __________
W I X
___/___/______ : __________
P O e
___/___/______ : __________
N C d
___/___/______ : __________
Y Q T
A Special thank you to Natalie Kahn and Elizabeth Aufzien who are students in Mr. Rodger Jaffe's Honors
Algebra II and Trigonometry Class for correcting the errors in the puzzle and taking the time to let me know.
This puzzle is in memory of my dad who taught math and loved history and Shakepeare.
He was certified to teach math, history, English, and Spanish!