Question

Help please. thanks :)

Answer 1

Answer:

A. x=8 y=21

Step-by-step explanation:

line l and line m are parallel, and both angles that have x in the values are on the same side, so they are equal to each other.

7x+12=12x-28

   +28      +28

7x+40=12x

-7x       -7x

40=5x

/5   /5

8=x

Since A is the only choice that has x=8, it must be the right answer.

Answer 2

Answer:

x = 8, y = 21

Step-by-step explanation:

parallel means they're equal so..

7x + 12 = 12x - 28

-7x -7x

12 = 5x -28

+28 +28

40 = 5x

8 = x

plug in 8 to 12x - 28

12(8) - 28

96 - 28 = 68

180 - 68 = 112

9y - 77 = 112

+77 +77

9y = 189

y = 21