Question

If 3x + y =10
3x - y =8

Find x and y​

Answer 1

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3x + y = 10 .... (i)

3x - y = 8 .... (ii)

Adding eqn (i) and (ii)

3x+y+3x-y=10+8

6x=18

x=18/6

x=3

Using x=3 in eqn (i)

3(3) + y = 10

y=10-9

y=1

Answer 2

Answer:

3x + y = 10 .... (i)

3x - y = 8 .... (ii)

Adding eqn (i) and (ii)

3x+y+3x-y=10+8

6x=18

x=18/6

x=3

Using x=3 in eqn (i)

3(3) + y = 10

y=10-9

y=1