Find value of x in the given pair of equations.
1x+a=3
1x−a=1
14
12
2
4
The two equations are 1x+a=3 1x−a=1 Now if we add both the equations, we get 1x−a+1x+a=1+3 ⇒2x=4 ⇒x=12
1x−a=1
1x+1y=4
1x−1y=2
If the pair of linear equations 3x-5y=11 and (5a+b)x-(7a-b)y=4(3a-2b)+1 have infinitely many solutions then find the value of a and b