SSC CGL 19 Oct 2014 Shift 2 Paper

Question : 124 of 200

Marks: +1, -0

The equations 3x + 4y = 10 – x + 2y = 0 have the solution (a, b). The value of a + b is

Solution:

3x + 4y = 10 ---(i)
– x + 2y = 0
Þ x = 2y
∴ From equation (i),
3 × 2y + 4y = 10 ⇒ 10y = 10
⇒ y =

{10}/{10}

= 1∴ x = 2
∴ (a, b) = (2, 1)
∴ a + b = 2 + 1 = 3

Go to Question:

Prev Question

Next Question