Question

Two seventh of a number is 30 less than the number . find the number

Answer 1

Let x = the number

So, the given situation can be expressed as:

`(2)/(7)x=30-x`

Then, solve for x:

`\begin{gathered} (2)/(7)x+x=30-x+x \\ (9)/(7)x=30 \\ (7)/(9)\cdot(9)/(7)x=30\cdot(7)/(9) \\ x=(210)/(9)=(70)/(3) \end{gathered}`

Answer: the number is 70/3