Andy C. answered • 09/02/17

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X is the number of $1 bills or "George Washington" picture on the $1

Y is the number of $5 bills of "Abraham Lincoln" picture on the $5

X + Y = 17 --> Y = 17 - x

X + 5Y = 49

X + 5(17 - x) = 49

x + 85 - 5x = 49

x + 85 - 5x - 49 = 0

36 - 4x = 0

36 = 4x

x=9 --> y = 17 - 9 = 8

**9 George Washington and 8 Lincolns.**

9 x 1 + 8 x 5 = 9 + 40 = 49