Linear equation

Q.

Which of the following are linear equations in one variable?

1. My sister’s age is twice my present age. 2 years hence , her age will be 20 more than my age.

2. More than 1 correct option.

3. I have a certain number of chocolates. If I get 5 more chocolates, the total number of

   chocolates increases to 20.

4. I have certain number of chocolates. The price of each chocolate is 2 more than the number

   of chocolates I have.

Q.

In the equation $ax+by+c=0$, if $y=\frac{(cx+d)}{b}$ then $x=$

1. $\frac{d+c}{a+c}$

2. $\frac{a+c}{d+c}$

3. $\frac{-d-c}{a+c}$

4. $\frac{b+c}{d+c}$

Q.

In the equation $ax+by+c=0$, if $y=\frac{(cx+d)}{b}$ then $x=$

1. $\frac{a+c}{d+c}$

2. $\frac{b+c}{d+c}$

3. $\frac{-d-c}{a+c}$

4. $\frac{d+c}{a+c}$