Solve the system of equations by elimination :
X+Y=7
2X-Y= 2

The correct answer is: We can also solve these system of equations by making the coefficients of x to be the same in both the equations

Complete step by step solution:
Let …(i)
and …(ii)
On adding (i) and (ii),
we get LHS to be  
and RHS to be 7 + 2 = 9
On equating LHS and RHS, we get 3x = 9
⇒ x = 3
On substituting the value of  in (i), we get 3 + y = 7
⇒ y = 4
Hence we get x = 3 and y = 4
Note: We can also solve these system of equations by making the coefficients of
to be the same in both the equations