Question

if x=a, y=b is the solution of the pair of equation x-y=2
and x + y = 4 then what will be value of a and b​

Answer 1

Answer:

a=3 b=1

Step-by-step explanation:

x-y=2

x=y+2

x+y=4

y+2+y=4

2y=2

y=1

put it in any equation to find x

x=y+2=1+2=3

Answer 2

• If x=a and y=b ,
• We can write the above equation like

a-b=2....eq(1)

a+b=4.....eq(2)

then -b and+b will be cancelled and we have only a+a =2a ..

2a=6

a=6/2

a=3

• put the value of a in eq.(1) so we obtain,
• a-b=2
• 3-b=2
• -b=2-3
• -b=-1
• b=1

The value of a=3 and b=1..