Respuesta :
The third choice is very useful. It's​ valid because two things that are both equal to 'y' are equal to each other, and it can be easily solved to find 'x'.
- x + 5 = 6x - 2 is used to find the solution set of the equation.
What is the solution set of the equation?
" Solution set of the equation is the set of all the variables present in the equation to make the given equation true."
According to the question,
Equation A represent :
y = - x +5
Equation B represent:
y = 6x - 2
Compare the value of y from equation A and equation B
- x + 5 = 6x - 2
Hence, we conclude that - x + 5 = 6x - 2 is used to find the solution set of the equation.
Learn more about solution set of the equation here
https://brainly.com/question/1270150
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