If `[a+4 3b8-6]=[2a+2b+2 8a-8b]` , write the value of `a-2b` .

Explanation

Given: `[(a+4, 3b),(8,-6)]=[(2a+2,b+2),( 8,a-8b)]`

Now both matrices are equal then

`implies a+4=2a+2`

`implies a−2a=2−4`

`implies −a=−2`

Hence `a=2.......(i)`

Also,

`implies 3b=b+2`

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