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Please answer with step by step

Please Answer With Step By Step class=

Sagot :

Answer:

a

Step-by-step explanation:

agree that AOB + BOC = AOC, right?

AOC = 25 = (4x - 15) + (2x + 10) solve for x first

25 = 6x - 5, now add 5 to both sides

30 = 6x   divide both sides by 6, so x = 5

now substitute: BOC = 2x+10 = 10 + 10 = 20

                          AOB = 4x - 15 = 20 - 15 = 5