We have to write an equation that represents the sentence: "The sum of 7 times a number and 3 equals 6".
The first part is the sum of "something" and 3. This "something" is 7 times a number (y), so we can express it as 7y.
Then the sum is 7y + 3.
This sum is equal to 6, so we can write the equation as:
Answer: 7y + 3 = 6