Question

If the sum of $y$ and ten times $x$ is equal to the product of $x$ and $y$, then give the formula with $y$ as the subject.

• A. $y=\frac{10 x}{x-1}$
• B. $y=\frac{10 x}{1-x}$
• C. $y=\frac{10 x}{x+1}$
• D. $y=\frac{10}{1-x}$

Answer 1

Answer: (A)

(i) $y+10 x=x y$
Apply transposition to make $y$ as the subject.
(ii) Given, $\gamma+10 x=x y$, make $y$ as the subject.
(iii) Collect the terms involving $\gamma$ and write on LHS and write the remaining terms on RHS.