যদি 3x -2y = 8 এবং 3x + 5y = 1 হয়, তাহলে x = কত?

যদি 3x -2y = 8 এবং 3x + 5y = 1 হয়, তাহলে x = কত?

A 5

B 2

C 7

D 10

Solution

Correct Answer: Option B

3x + 5y = 1

=> 5y=1-3x

y=(1-3x)/5

Again,

3x -2y = 8

=> 3x-2(1-3x)/5=8

=>15x-2+6x=40

=> 21x=42

x=2