x+2 = -2x + 20
3 x = 18
x = 6
so side = 8
14 - 8 = 8 so 14-x works
and 2x + 4 is not 8
Two sides of an equilateral triangle have lengths x+2 and -2x+20 which could be the length of the third side:14-x or 2x+4?
A. 14-xonly
B. Both 14x and 2x+4
C. 2x+4 only.
D. Neither 14-x nor 2x+4
1 answer