Respuesta :

Answer:

x = 13

Step-by-step explanation:

The angle adjacent to (2x + 19) on line l is corresponding to (9x + 18) and are congruent.

Then (2x + 19) and (9x + 18) are adjacent angles and supplementary, that is

2x + 19 + 9x + 18 = 180

11x + 37 = 180 ( subtract 37 from both sides )

11x = 143 ( divide both sides by 11 )

x = 13

thebecks

Answer:

x = 13

Step-by-step explanation:

(9x+18)+ (2x+19) = 180 because they are same side exterior angles

reduce:

11x + 37 = 180

11x = 143

x = 13

check:

9(13) + 18 + 2(13) + 19 = 180

117 + 18 + 26 + 19 = 180

180 = 180

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