Answer: C) (1, -1)
Step-by-Step Explanation:
Solving by Substitution Method :-
=> 7x + y = 6 (Eq. 1)
=> x + 2y = -1 (Eq. 2)
Therefore, from Eq. 2 :-
=> x = -1 - 2y (Eq. 3)
Substitute value of ‘x’ in Eq. 1 :-
=> 7x + y = 6
= 7(-1 - 2y) + y = 6
= -7 - 14y + y = 6
= -14y + y = 6 + 7 = 13
= -13y = 13
=> y = 13/-13 = -1
Therefore, y = -1
Substitute value of ‘y’ in Eq. 3 :-
=> x = -1 - 2y
= x = -1 - 2(-1)
=> x = -1 + 2 = 1
Therefore, x = 1
Hence, x = 1, y = -1 (1, -1)
