Question

Please help me and explain how to find the result

Answer 1

A family consumes 1.2kg of rice a day

If the family have 30ky of rice

Let the number of days be x

The minimum number of days required for the amount of rice remaining not to be more than 6kg can be expressed below as

`30-1.2x\le6`

Solve for x by collecting like terms

`\begin{gathered} 30-1.2x\le6 \\ 30-6\le1.2x \\ 24\le1.2x \\ 1.2x\ge24 \\ \text{Divide both sides by 1.2} \\ (1.2x)/(1.2)\ge(24)/(1.2) \\ x\ge20\text{ days} \end{gathered}`

Hence, the minimum number of days required for the amount of rice remaining not to be more than 6kg is 20 days