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Mathematics, 11.07.2019 07:30 lilpeepxliltracy

∠a and ∠b are vertical angles with  m∠a=x and  m∠b=4x−30 . what is m∠a ?

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∠a and ∠b are vertical angles with  m∠a=x and  m∠b=4x−30 . what is m∠a ?...
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