Which of the following equations have the correct solution? Select all that apply 3n+7=16;n=3

11=2/3x-1;x=15

x+3/-6 =2x;x=3/13
the x+3/-6 is all one fraction

20-2t=1/2+28;t=-3.2

4+y-2-2y=16+y; no solutions

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2