Question

1) if A=-3x-y+5, b=x+2y+3, then 3A-5b=

Answer 1

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Answer 2

$Given,$

A = -3x - y + 5
b = x + 2y + 3

$\huge{To\ find\ , 3A - 5b}$

REPLACING A and b by their given value

3(-3x-y+5) -5(x+2y+3) = 3A-5b

-9x-3y+15-5x-10y-15 = 3A-5b

-14x-13y = 3A-5b

3A-5b = -14x-13y.

$\huge{or}$

3A-5b = -(14x+13y)