Exercise 7 (A), Composite Mathematics class 7th by S.K. Gupta and Anubhuti Gangal

 

Hello Everyone welcome to UTUG Education. We will see the solution of Composite Mathematics class 7^th by S.K. Gupta and Anubhuti Gangal of S.Chand School Publication.

This is your Chapter – 7 ,  Linear Equations in One Variable of the book this is the part of Algebra unit which is your 2^nd unit of the book.

Key Facts:- 

• A statement of equality like 6 + x = 11, which contains an unknown quantity is called an equation.
• Statement like x < 4 and x >  7 are called inequalities or in equations.
• Any equation consists of left side, an equal sign ('=') and a right side.   

                                                            Left side = Right side

• A number which satisfies an equation is called the solution or root of the equation. for e.g. the solution of the equation 5 + x = 7 is 2. In other words, the value of x, called the variable, which makes the given equation a true statement, is the solution of the root of the equation.
• The same number can be added to both sides of an equation. 
• The same number can be subtracted to both sides of an equation. 
• Both sides of an equation can be multiplied by the same number.
• Both sides of an equation can be divided by the same number.
• Any number may be transferred from one side of an equation to the other if we change its sign    (+ to -, - to +)

Exercise 7 (A)

Question 1 and 2

Question 3

Question 4 and 5

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