The sum of Mario and Maria's ages now is 7. Mario is 1 year older than Maria. How old is Mario?
Please answer the following question by reasoning step-by-step.
4
If x is Maria's age, then Mario's age is x + 1.

The equation that represents the sum of their ages is x + x + 1 = 7.

By combining like terms, the equation becomes 2x = 6.

Hence, the value of x which represents the age of Maria is 6 / 2 = 3.

So Mariu is 3 + 1 = 4 years old.

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So, the answer is 4