Final answer:
Assuming the equation y + 7 = 3x is the one that relates x to y, when x equals three, the value of y would be two after solving the equation by substitution.
Step-by-step explanation:
The initial part of the question contains several typographical errors, which we will disregard. We will focus on what appears to be the main mathematical part of the question: determining the value of y given a linear relationship when x equals three. The provided linear equations, such as 7y = 6x + 8 and y + 7 = 3x, imply that there is a direct relationship between x and y. To find the value of y when x equals three, we need to know the specific equation that binds y to x. However, that equation hasn't been provided, so let's assume it's one of the given examples, such as y + 7 = 3x.
Using the equation y + 7 = 3x and substituting x = 3:
y + 7 = 3(3)y + 7 = 9y = 9 - 7y = 2
Thus, if x equals three, y would be two based on the example equation y + 7 = 3x.