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If (a,b) is a solution of the system of ...

If (a,b) is a solution of the system of equations
`{{:(2x-y=7),(x+y=8):}` , then the difference , a-b , equals

A

`-12`

B

`-10`

C

0

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
Adding the equations gives 3x=5. x=5 and y=3. a-b=2
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