Respuesta :

eldusa

Step-by-step explanation:

collect the like terms 12x+4=9x+8

12x-9x=8-4

3x=4

X=1.333

Answer:

8

Step-by-step explanation:

  • As both angles are corresponding their sum will be 180

➝12x+4+9x+8=180

➝12x+9x+4+8=180

➝21x+12=180

➝21x=180-12

➝21x=168

➝x=168/21

➝x=8

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