Three angles of the triangle:
[tex]29[/tex]
[tex]x + 17[/tex]
[tex]4x + 9[/tex]
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Angle sum of triangle = 180°
[tex](29) + (x + 17) + (4x + 9) = 180[/tex]
[tex]29 + x + 17 + 4x + 9 = 180[/tex]
[tex](29 + 17 + 9) + (4x + x) = 180[/tex]
[tex]55 + 5x = 180[/tex]
[tex]5x = 180 - 55[/tex]
[tex]5x = 125[/tex]
[tex]x = \frac{125}{5} [/tex]
[tex]x = 25[/tex]
