Which expression is NOT a linear equation in the form a x + b = c (with a ≠ 0)?

Solve x − 6 = 0 and present the final answer clearly.

Evaluate the following student's solution to 3x − 4 = 11: they added 4 to both sides to get 3x = 7, then divided by 3 and concluded x = 7/3. Determine whether the steps and final answer are correct, and if not provide the correct solution.

Solve 2x + 3 = 11.

Solve for x: (-2/5)x = 8.

A contractor charges a fixed deposit plus an hourly rate, which together equal the total cost. The model is (3/5)h + 120 = 420, where h is the number of hours worked. Solve for h and report the result as a whole number of hours.

Solve the following linear equation for $x$: $\frac{1}{2}x+7=19$

Solve the following equation for $x$: $\frac{1}{3}x-\frac{5}{6}=\frac{1}{2}$

Consider the equation $\frac{1}{4}x=3$. If you multiply both sides by $0$ to eliminate the fraction, does this operation preserve the original solution set? Justify your answer.

Which of the following best describes the fundamental difference between the solution to a linear equation (e.g., $ax+b=c$) and a linear inequality (e.g., $ax+b>c$)?

A student solves the inequality $-4x>12$ and concludes that $x>-3$. Which statement correctly identifies the student's error and provides the proper solution?

Solve the inequality for $x$.