Let a and b be natural numbers. If a^2 + ab + a = 14 and b^2 + ab + b = 28, then (2a + b) equals?

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Let a and b be natural numbers. If
a^2 + ab + a = 14 and b^2 + ab + b = 28, then (2a + b) equals
a) 10
b) 7
c) 8
d) 9
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Very nicely explained but would appreciate if you give fast tricks and shortcuts because CAT mei itna time nhi milta😅

kartikjain