Question

Solve the inequality 17 less than or equal to 3 - 2x less than or equal to 21

Answer 1

\[17\le 3-2x \le21\]
\[14\le -2x \le18\]

\[-7\le x \le-9\]

Answer 2

when dividing by a negative
do not forget to switch the inequality symbols around,

Roachie has
−7≤x≤−9
but this cannot be true as -9 is less that -7 .

switching the symbols
−7≥x≥−9

Answer 3

Ohhh okay, thank you both.