Andrew M. answered • 02/15/18

Tutor

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Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

Opposite angles of a cyclic quadrilateral add to 180 degrees.

60 - 3x + 4x - 7 = 180

x + 53 = 180

x = 127

Check:

60-3(127) + 4(127)-7 = 180

60-381 + 508-7 = 180

180 = 180

Answer is verified

Andrew M.

02/15/18