Mathematics

Mathematics, 21.03.2021 22:10, emmaty6821

The angles of a triangles are x°, 3x° and 30°. When asked to solve for x, Alvi shows the work in post-it A below. Brian shows the work in post-it B below. Who is correct and why? Why mistake did the incorrect person make? that is the pic for post it a.
the post it b said

x + 3x + 30 = 180
4x + 30 = 180
4x = 150
x = 37.5

The angles of a triangles are x°, 3x° and 30°. When asked to solve for x, Alvi shows the work in po

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The angles of a triangles are x°, 3x° and 30°. When asked to solve for x, Alvi shows the work in pos...

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