Which of the Following Is a Linear Equation?
A) $\sqrt { x } + 14 = 15 x$

Multiple Choice

Which of the following is a linear equation?

A) $\sqrt { x } + 14 = 15 x$
B) $3 x ^ { 2 } + 10 x = 5$
C) $\frac { 10 } { 3 x } - 3 = \frac { 7 } { x } + 15 x$
D) $\frac { 10 } { 3 } x - 3 = 7 x + 15$