Twice a number decreased by 16

Question

i need it in the algebraic expression

Answer 1

2N - 16

twice a number decreased by 16

or

maybe it's intended to be

2(N-16) = 2N -32

but given PEMDAS, order of arithmetic operations, M comes before S, multiplication comes before subtraction, so do 2N first then subtract 16. Go with 2N -16 which equals 2(N-8) not 2(N-16)