Question

(2) For a simultaneous equation in x and y, D = 25, D = 5 and D = 50.
Hence find the value of x.
(A) 25
(B) 50
(C) 10 (D) 5
(3)
x + 3
In the adjacent figure, the lengths of
sides of a rectangle are shown. Which
x + 2 of the equations is consistent with the
given information ?
Зу
y + 7
(A) x - 3y = 2
(C) x + 3y = 2
(B) x - y = 4
(D) x + y = -4
​

Answer 1

Q no 1 :by cross multiply by rule

=3×1-(2×-1)

=3+2

=5

Q no 2: x = Dx/D

:x=25/5

x =5