Answer:

Equation : 4n = 15 + 7n

Solve the given equation

4n = 15 + 7n

-7n + 4n = 15

-3n = 15

-3n/-3 = 15/-3

n = -5

Substitute -5 to n

4n = 15 + 7n

4(-5) = 15 + 7(-5)

-20 = 15 + (-35)

-20 = -20

-5 is the number.

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