Create a system of equations from a word problem

The video tutorial explains how to solve a problem involving the concept of 'less than' in equations. It starts by introducing the problem statement and then delves into understanding what 'less than' means in mathematical terms. The tutorial guides viewers through solving the equation c - 9 = d, using elimination to narrow down possible solutions. Finally, it confirms the correct answer and explains the concept of 'twice c'.

What mathematical operation is used to represent '0 less than a number'?

• Division

• Multiplication

• Subtraction

• Addition

In the equation c - 9 = d, what does 'c' represent?

• The number d

• A known constant

• An unknown number

• The number 9

How many solutions were eliminated after analyzing the equation c - 9 = d?

• Three

• Four

• Two

• One

What does 'twice c' mean in mathematical terms?

• 2c

• c/2

• c + 2

• c - 2

What is the final answer to the problem discussed in the video?

• a

• d

• b

• c