Question

if x =a y=b is the solution of the equation 3x -2y =5 and x +2y = -1 then the value of a and b are respectively
i) 1 and 2
ii) 3 and -2
iii) 1 and -1
iv) -3 and 2​

Answer 1

Answer:

c

Step-by-step explanation:

let us substitute a and b in x and y

3a-2b=5...................I

a+2b= -1 ...................II

adding I and II

3a-2b=5.

a+2b= -1

___________

4a+0b=4

4a=4

a=1

sub a=1 in II

1+2b=-1

2b=-1-1

b=-2/2

b=-1

correct option is C

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