Question

Below is given a question followed by two statements numbered I and II. The question may or may not be answered with the help of these statements. You have to decide if these statements are sufficient to answer the question. What is the value of "x"? Statements: I. x + y = 15 II. 3x - y = 1

Answer 1

x + y = 15
3x - y = 1
_______
4x = 16
x = 4

and
x + y = 15
4 + y = 15
y = 11

Answer 2

Yes... this is possible to deduct the values of x and y based on the given equations.

x + y = 15

or, y = 15 - x .......A

3x - y = 1

or, 3x - (15 - x) = 1 [ putting the value of y from equation A ]

or, 3x - 15 + x = 1

or, 4x = 16

or, x = 16/4

or, x = 4

thus, y = 15 - 4 = 11 [ putting the value of x in equation A ]

Keep in mind that if number of equations given matches the number of variables, it is possible to answer.