Respuesta :

EXPLANATION:

-The first equation has a unique solution where we must find only the value of Y

-The second equation only has a single solution where we must find the value for the variable q

-In the third equation we can solve it in different ways for when the equation is equal to 7 we can use any mathematical method of equalization, reduction or substitution.

-The fourth equation only has a single solution where we can use the matching method to find the value of p

So the answer is the third option.

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