Question

What is the value of y if (1,y) satisfy the equation $2x+\frac{3}{5}y=\frac{7}{5}$.

• A. 1
• B. -2
• C. -3
• D. -1

Answer 1

Answer: (D)

-1

Given, $2x+\frac{3y}{5}=\frac{7}{5}$

$\Rightarrow 2x=\frac{7}{5}-\frac{3y}{5}$

$\Rightarrow 2x=\frac{7-3y}{5}$

$\Rightarrow 10x+3y=7$

$\Rightarrow$ the value of $y$ in $(1,y)$ is $10\times 1+3y=7$

$\Rightarrow 3y=7-10=-3$

$\Rightarrow y=\frac{-3}{3}=-1$

$\therefore y=-1$