5x + 2y = 57 These are the equations
x + y = 18
5x + 2y = 57
-5x - 5y = -90 This is the procedure to find x and y
-3y = -33
y = -33/-3
y = 11
x + 11 = 18
x = 18 - 11
x = 7
The numbers are 7 and 11
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