Preview question: $$ -5 \left( -4 x - 21 \right) = -3 \left( -13 - 3 x \right) $$

Behaviour being used: Adaptive mode

Minimum fraction: 0

Question summary: $$ -5 \left( -4 x - 21 \right) = -3 \left( -13 - 3 x \right) $$

Right answer summary: -6

Question state: todo