Which 7

Which choice is NOT equivalent to the following expression? 9 x { [ 14 ÷ 2 + (4-1) ] - 8 }


A 9 x { 10 - 8 }
B 9 x { [ 14 ÷ 2 + 3] - 8 }
C 9 x 10 - 8
D 18

Correct answer:

x = C

Step-by-step explanation:

$$\begin{gathered} a=9\cdot ((14/2+(4-1))-8)=18 \\ A=9\cdot (10-8)=18 \\ B=9\cdot ((14/2+3)-8)=18 \\ C=9\cdot 10-8=82 \\ D=18 \\ a=A=B=D=18 \\ C\ne a \\ x=C \end{gathered}$$

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