Forming Algebraic Equations (Subtraction)

Q.

The cost of $x$ pencils is $₹150$ . Write an algebraic expression for the cost of each pencil.

Q.

Write each phrase as an algebraic expression.

(a) Twenty times of h hours.

Q. On Tuesday, 102 students in a class decided to go on a tour. All the students went on the bus except for 7 of them who were traveling in their own car.
Write an algebric expression for the number of students who traveled by bus.

1. $x=102-7$
2. $x=102+7$
3. $x=102\times 7$
4. $x=102÷7$

Q. Car Sales Statistics:
New York registered 7, 898 cars in July and 7, 689 cars in August. Express an algebraic equation for the total number of cars registered between July and August.

1. $x=7,898÷7,689$
   
   
2. $x=7,898+7,689$
   
   
3. $x=7,898\times 7,689$
   
   
4. $x=7,898-7,689$
   
   

Q.

Write each phrase as an algebraic expression.

Thrice as many apples.

Q.

Change the following statements using expressions into statement in ordinary language:

(v) The total number of students in the school is $20$ times that of our class.

Q. On his birthday, Robert received 79 chocolates. He ate six of them before giving three to her sister, and after sharing two chocolates to each of his 27 friends, he was left with $x$ number of chocolates.
Derive an algebraic expression for $x$ from the above comprehension

1. $79-6-3+54=x$
2. $79-6-3-54=x$
3. $79+6+3+54=x$
4. $79+6+3+54=-x$

Q. Mr. John has thirteen less bullets than Mr. Robert, who has eighteen bullets. Choose the right algebric expression for the number of bullets with Mr.John.

1. $x=18-13$
2. $x=18+13$
3. $x=18\times 13$
4. $x=18÷13$

Q. The difference between two numbers is 34. If the larger number is 53, select the correct algebraic expression for this statement.

1. $53+x=34$
2. $53-x=34$
3. $53\times x=34$
4. $53÷x=34$