Question

Solve the pair of linear equations x-y=2 and x+y=2 .also find p if p=2x+3

Answer 1

The two equations are

x + y = 2
x - y = 2

Adding the two equations, we get 2x = 4 or x = 2.

Then, 2 + y = 2 or y = 0

So, if x = 2, then, substituting this in p = 2x + 3, we get

p = 2*2+3 = 4+3 = 7.

Answer 2

The two equations are

x + y = 2

x - y = 2

Adding the two equations, we get 2x = 4 or x = 2.

Then, 2 + y = 2 or y = 0

So, if x = 2, then, substituting this in p = 2x + 3, we get

p = 2*2+3 = 4+3 = 7.

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