What is Equality in Math

Introduction to what is equality in math:

Equality in math means an equation which has equal sign. The equality specifies that the term which is left of the equal sign is equal to the term which is on the right of the equal sign.  In number line we can specify it by a closed dot. The equation may have unknown variables we can solve those types of equations.

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Example problems - What is equality in math:


Example 1 - What is equality in math:

Find the value of x and the given equation is x+14 =79.

Solution:

The given equation is x+14 =79.

Subtract 14 on both sides `=>` x+14-14 =79-14

x = 65.

Example 2- What is equality in math:

Find the value of y and the equation is 3y+18 = 36.

Solution:

The given equation is 3y+18 = 36.

Subtract 18 on both sides 3y+18 = 36

3y+18-18 = 36-18

3y = 18

Divide by 3 on both sides

3y/3 = 18/3

y = 6.

Example 3 - What is equality in math:

Draw a number line for the equality 8a+ 19 = 67

Solution:

The given equality is 8a+ 19 = 67

Subtract 19 on both sides

8a+ 19 = 67

8a + 19 -19 =67-19

8a = 48

Divide by 8 on both sides

8a/8 = 48/8

a = 6.

In a number line there is a closed dot on number 6.

Example 4 - What is equality in math:

Find the value for equality m + n = 9 and n= 10.

Solution:

The given equalities are m +n =9 and n=10

Now substitute the value of n in m + n = 9.

m + n = 9

m + 9 = 10

Subtract 9 on both sides of the equality m + 9 = 10

m + 9 -9= 10 -9

m = 1

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Practice problems - What is equality in math:


Solve the equality and find the unknown value 2p+13 = 39. [Ans : p = 13].

Solve the equality and find the unknown value 9r+18 = 18. [Ans : r =0].