Given:
Duarte spends 30 minutes playing chess with his dad most evenings.
To find:
The equation for the number of minutes m if they played chess together in e evenings.
Step-by-step explanation:
According to the question,
The variable "m" represents the number of minutes that Duarte spent playing chess with his dad.
The variable "e" represents the number of evenings playing chess.
Let us write the equation as follows,

Thus, the equation is,

Final answer:
An equation for the number of minutes m, that Duarte spent playing chess with his dad if they played chess together in e evenings is,
