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Could someone explain this problem and answer it I would really appreciate it and I will give a brainless also for extra an extra thank you:)

Could someone explain this problem and answer it I would really appreciate it and I will give a brainless also for extra an extra thank you class=

Respuesta :

278355

Answer:

30

Step-by-step explanation:

i think that cause the lines are perpendicular and if one side is a certain number the other is going to be the same, such as symmetrical things.