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Find the value of a if [(a-b,2a+c),(2a-b...

Find the value of `a` if `[(a-b,2a+c),(2a-b,c+d)]=[(-1,5),(0,13)]`

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With the given equation,
`a-b = -1=> a = b-1->(1)`
`2a+c = 5`
`2a-b = 0 => a = b/2->(2)`
`c+d = 13`
From (1) and (2),
`b-1 = b/2`
`=>b/2 = 1=> b = 2`
...
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