Respuesta:
x = 20°
Explicación paso a paso:
4x + x - 10 = 90°
5x - 10 = 90°
5x = 90° + 10
5x = 100°
x = 100°
-------
5
Comprobación
4 ( 20° ) = 80°
( 20° ) - 10 = 10°
80° + 10° = 90°
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Respuesta:
x = 20°
Explicación paso a paso:
4x + x - 10 = 90°
5x - 10 = 90°
5x = 90° + 10
5x = 100°
x = 100°
-------
5
x = 20°
Comprobación
4 ( 20° ) = 80°
( 20° ) - 10 = 10°
80° + 10° = 90°