Chapter ISG, Problem 5.1.2.16P

To determine

To define a variable, write and solve an inequality

Answer to Problem 5.1.2.16P

Let the initial weight of the box be $x$ kg

  $x+8<20$

  $x<12$ (Initial weight of the box is less than 12 kg)

Explanation of Solution

Given information:

J adds 8kg of newspaper to a box

Weight of Box(with newspaper) is less than 20kg

Calculation:

Let the initial weight of the box be $x$ kg

On adding 8kg newspaper to the box total weight becomes $x+8$

It is given that Weight of Box(with newspaper) is less than 20kg

So the inequality becomes:-

  $x+8<20$

On subtracting 8 from both sides

  $x+8-8<20-8$

Hence,

  $x<12$

So the Initial weight of the box is less than 12 kg.