3 years ago

The sum of two numbers is 31. The sum of the smaller and 3 times the larger is 85

1 answer:

6 0

X+y=31 So, x=31-y
x+3y=85

31-y+3y=85
31+2y=85
2y=54
y=27
x+3×27=85
x+81=85
x=4

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