3n+15t-2n+20m+7n+7n-15m помогите пожалуйста

Question

3n+15t-2n+20m+7n+7n-15m помогите пожалуйста

Answer 1

3n+15t-2n+20m+7n+7n-15m=15n+20m= 5(3n+4m)

Answer 2

(3n-2n+7n+7n)+15t+(20m-15m) = 15n+15t+5m = 5*(3n+3t+m)