How to use elimination to solve a word problem

The video tutorial explains how to solve a word problem involving the number of countries where English and Farsi are spoken as the first language. It guides through defining variables, setting up equations, and using the elimination method to find the solution. The problem states that English is spoken in 78 more countries than Farsi, and together they are spoken in 130 countries. The solution involves defining variables for the number of countries, setting up equations, and solving them to find that English is spoken in 104 countries and Farsi in 26.

What is the first step in solving a word problem according to the video?

• Guess the answer

• Define the variables

• Write the final answer

• Ignore the question

How many more countries speak English as a first language compared to Farsi?

• 100

• 130

• 78

• 50

What operation is suggested when the problem states 'together'?

• Multiplication

• Subtraction

• Addition

• Division

What is the equation formed to represent the total number of countries speaking English and Farsi?

• X / Y = 130

• X - Y = 130

• X + Y = 130

• X * Y = 130

What method is used to eliminate variables in the equations?

• Substitution

• Graphing

• Elimination

• Trial and Error

How many countries speak Farsi as a first language?

• 78

• 52

• 104

• 26

What is the final number of countries where English is spoken as a first language?

• 78

• 104

• 52

• 26