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Let $$m$$ should be added to 3(x-2y) to obtain 2(3x + y) - 5(2x + 3)
=> $$(m) + [3(x-2y)] = 2(3x+y)-5(2x+3)$$
=> $$m + 3x-6y=6x+2y-10x-15$$
=> $$m = (2y+6y)+(-4x-3x)-15$$
=> $$m=8y-7x-15$$
=> Ans - (A)
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