Question

A machine takes 2litres of petrol to start and then 3 litres per hour while running.If the equation thus formed is of the form of ax+by+c=0 .What is the value of $a$ when linear equation is written as $ax+by+c=0$

• A. $2$
• B. $0$
• C. $3$
• D. $1$

Answer 1

The correct option is C $3$

Amount of petrol used =$y$
No. of hours for which machine will work = $x$

According to given condition
$\therefore y=3x+2$
$\Rightarrow y-3x-2=0$
$\Rightarrow 3x-y+2=0$
$a=3,b=-1,c=2$

$a=3$