Mathematics

Solve the simultaneous equations y = 3x; 4y – 5x =14

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)