Question

the equation x+3y=5 and 2x-by =10 represent the same line if b=

Answer 1

if b = -6 the both will represent same line

Answer 2

Let x + 3y = 5 ..... Eqn 1

Let 2x - by = 10 .....Eqn 2

Multiply equation 1 with 2

2x + 6y = 10 ....Eqn 3

Compare Eqn 2 with Eqn 3

-b = 6

Or, b= -6

Ans: on solving, the correct value of 'b' is -6