Preview question: $$ -2 \left( -2 x + 24 \right) = 4 \left( -21 + 2 x \right) $$

Behaviour being used: Adaptive mode

Minimum fraction: 0

Question summary: $$ -2 \left( -2 x + 24 \right) = 4 \left( -21 + 2 x \right) $$

Right answer summary: 9

Question state: todo