Question

if a+b =c and a-b=d then the value of b is​

Answer 1

Answer:

b= c-a

Step-by-step explanation:

For example if

a=3, b=2 =c=5

Therefore b= c- a= b =2

Answer 2

Let the cost of a notebook to be = ₹ x

Let the cost of a pen to be = ₹ y

According to the question,

The cost of a notebook is twice the cost of a pen.

i.e., Cost of a notebook = 2×Cost of a pen

x = 2×y

x = 2y

x-2y = 0

x-2y = 0 is the linear equation in two variables to represent the statement ‘The cost of a notebook is twice the cost of a pen’.