Question

Solve the equation by trial and error method: 30 - y = 20​

Answer 1

Step-by-step explanation:

Let 'y' be = 20

LHS = 30 - 20 RHS = 20

LHS= 30 - 20

= 10

Therefore, LHS is not equal to RHS

Now, let 'y' be 10

LHS = 30 - 10 RHS = 20

LHS = 20

Therefore, LHS = RHS

Answer 2

Answer:

Given:-

Solve the equation by trial and error method: 30 - y = 20

To Find:-

The equation of 30 - y = 20 ( by trial and error method)

Solution:-

By trial method, Let's take Y as 5 , so now~

● $30 - y = 20$

Y = 5

● $30 - 5 = 20$

● $25 ≠ 20$

So LHS ≠ RHS

So the value of Y is not 5

_______________________

Now, Let's take the value of Y as 8

● $30 - y = 20$

Y = 8

● $30 - 8 = 20$

● $22 ≠ 20$

So LHS ≠ RHS

So the value of Y is not 8

_______________________

Now, Let's take the value of Y as 10

● $30 - y = 20$

Y = 10

● $30 - 10 = 20$

● $20 = 20$

So LHS = RHS.

Answer:-

Hence it is proved that, The value of $y = 10$

:)