Question

By solving a pair of Linear equations x+ y =20 and x - y = 10, the values of x and "y'are, A)15 & 5 B) 5 & 15 C) 18 & 2 D) 2 & 18​

Answer 1

Answer:

Step by step explanation

x + y = 20

x - y = 10

Adding both the equations above

2x = 30

x = 15

Putting the value of x in x + y = 20, we get

x + y = 20

15 + y = 20

y = 5

Hence x = 15, y = 5

Answer 2

Answer:

A) 15 & 5

Step-by-step explanation:

x+y=20 x-y=10

→y=20-x →x=10+y

→y=20-(10+y) →x=10+5

→y+y=10 →x=15

→2y=10

→y=10/2

→y=5

So, x=15 & y=5.

(*NOTE:-We will have to solve both the equations simultaneously)

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