Question

2. A number when multiplied by 5 is increased by 80. The number is
a) 15
b) 20
c) 25
d) 30​

Answer 1

Step-by-step explanation:

We need to find a number which when

multiplied by 5 will be increased by 80.

While solving these questions, The unknown

quantity must be assigned a variable

What are variables?

Variables are alphabets which take any

value.

So, Let the number be x

Number when multiplied by 5 implies

x*5

>5x

Number increased by 80 implies

+ 80

x

Question:A number which when multiplied

Dys will be increased by 80.

Since, we have assumed x is the number. The

question changes to

when multiplied by 5 is increased by 80

5x = x + 80

To find x, unknowns should be on one side of

the equation and constants on other side.

ubtractinc y from

cicos

5x x = x + 80 - x

4x 80

Dividing by 4 on both sides

4x 4 = 80 4

x 20

Therefore, The number is 20.

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Answer 2

A number when multiplied by 5 is increased by 80. The number is

5×16=80