Question

solve the simulataneous equation : x + y = 9 and x-y = 1 step by step​

Answer 1

Step-by-step explanation:

x+y=9 .......eq(i)

x=9-y

x-y=1

Put the value of x in eq (ii)

9-y-y=1

9-2y=1

8=2y

y=4

put the value of y in eq(i)

x=5

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Answer 2

Step-by-step explanation:

x+y=9......(1)

x-y=1....(2)

from equation 2 we can write

x= 1+y

putting this in equation 1

1+y+y= 9

1+2y=9

2y=8

y=4

if y=4 then

x=4+1=5

therefore x=5 and y=4