Determine which of the following equations are linear equations in x.
a) 2x+x-3=0
b) 14=x²
c) 8x-3=8
d) 2x + 7y=6

Determine which of the following equations are linear equations. Select all that apply.
A. 2x+7y=6
B. 2x+x-3=0
C. 14=x²
D. 8x-3=8