How can you create an equivalent equation by using the properties of equality

1.       Properties of equality refer to two different equations having the same sum of equivalent value.

For example
=> 7 + 3 – 3 = 8 + 2 – 3
=>  10 – 3 = 10 - 3
=> 7 = 7

Property of equality may apply to addition, subtraction, multiplication and division:
For addition:
if x – y = c , then x – y + y = z + y or x = z + y
For subtraction:
if x + y = z , then x + y –y = z – y, or a = z – y
For multiplication
if x/y = z and y is not equal to 0, then x/y * y = z * y, or x = yz
For division
if x * y = z, and y is not equals to 0, then x * y  = z  , or  x = z
                                                                  y         y                y

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)