Question

class 8 chapter 2 exercise 2.2 question 12 and 13
help me please! ​

Answer 1

Questions:

A) Fifteen years from now Ravi's age will be four times his present age. What is Ravi's present age?

B) A rational number is such that when you multiply it by $\frac{5}{2}$ and add $\frac{2}{3}$ to the product you get $\frac{-7}{12}$. What is the number

Answer:

A) $x=5$

B)$\frac{1}{2}$

Step-by-step explanation:

A)

Present age of Ravi : $x$

Ravi's age after 15 years : $x+15$ = $4x(given)$

$x+15$ = $4x$

transposing x in both the sides: $3x = 15$

$x=5$

B)

(Attachment)