Technical information
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: $$ -3 \left( 15 + 2 x \right) = -3 \left( -2 x - 21 \right) $$
Right answer summary: -9
Question state: todo
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: $$ -3 \left( 15 + 2 x \right) = -3 \left( -2 x - 21 \right) $$
Right answer summary: -9
Question state: todo