Question

If $(a,2)$ is the point of intersection of the straight lines $y=2x-4$ and $y=x+c$, then the value of $c$ is equal to

• A. -1
• B. 3
• C. -2
• D. -3
• E. 1

Answer 1

Answer: (A)

$y=x+C$
$y=2x-4$
$2y=2x+2C$
$y=2C+4$
$\Rightarrow 2=2C+4$
$\Rightarrow 2C=-2$
$C=-1$