Question

The sum of two numbers is 74. If the larger number is subtracted from three times the smaller, the result is 42. Find the numbers.
Ms. Sue
x + y = 74
3y - x = 42

x = 74 - y

3y - 74 - y = 42
2y = 116
y = 58
a + b = 74 so b = 74-a

3a - b = 42

-------------------------------
3 a - 74 + a = 42

4 a = 116

etc
-74+y not -74-y I think

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