Solve the simultaneous equations y = 3x; 4y – 5x =14
-
A.
.-2,-6 -
B.
2,6 -
C.
2,-6 -
D.
-2,6 -
E.
-1,-3
Correct Answer: Option B
Explanation
y = 3x … (i);
4y – 5x =14 … (ii)
Put 3x for y in (ii).
4(3x) – 5x = 14
12x – 5x = 14
7x = 14 (implies) x = 2.
y = 3x = 3(2) = 6
(x, y) = (2, 6)