-2x – 9 = -4
find x please

Which of the following is a justification used while proving the similarity of triangles lom and mon

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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