Final answer:
The question pertains to identifying linear equations from provided options. All options (a, b, c) are linear equations, thus the correct answer is d) All of the above.
Step-by-step explanation:
The question falls under the category of Mathematics, specifically dealing with linear equations. These are equations that graph to a straight line, and can be written in the form y = mx + b, where m is the slope and b is the y-intercept. For the given options:
- (a) x + 2 = 7 is a linear equation and can be simplified to x = 5, with a slope of 0.
- (b) 3y - 5 = 2y + 1 is also a linear equation and simplifies to y = 6.
- (c) 4z = 12 is a linear equation with z = 3.
Upon examining the provided practice test information and solutions, it's clear that all the given options a), b), and c) are linear equations. Hence, when it comes to choosing any one option, the mention of the correct option in the final answer is d) All of the above. Each equation can be simplified or rearranged into the y = mx + b form.