Question

1. If (1, -2) is a solution of a linear equation 2x – y = p, then find the value of p.​

Answer 1

The value of p is 4.

Explanation:

In order to find p, you have to substitute the value of x and y into the linear equation :

`2x - y = p`

`let \: x = 1 \\ let \: y = - 2`

`2(1) - ( - 2) = p`

`2 + 2 = p`

`p = 4`

Answer 2

Just put the values of x and y

x = 1

y = -2

2x – y = p

2(1) - (- 2) = p

p = 4