Question

Could you please explain this to me

Answer 1

the sum of the internal angles of a triangle is equal to 180, therefore:

`\begin{gathered} \angle CAB+\angle CBA+77=180 \\ 3x+50+3x+5+77=180 \\ 6x+132=180 \\ 6x+132-132=180-132 \\ 6x=48 \\ (6x)/(6)=(48)/(6) \\ x=8 \end{gathered}`

answer:

x = 8

74

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