Answer:
Step-by-step explanation:
A is a quadratic. Quadratics are not linear. It contains an x^2 term.
B isn't really a true value for a solution to a linear equation because there are x's on both sides of the equation. They can be divided out leaving you with 12 = 17.
C is linear It has 1 solution The answer to C is 3.64
D is linear it has 1 solution The answer to D is 5/12
Both C and D have only 1 solution each. That is one of the characteristics of linear equations.
