Respuesta:
x = 135°
Explicación paso a paso:
La suma de todos los ángulos de la figura = 360°
(2x + 20) + (30 - 3x) + 4x + (40 - x) = 360
2x - 3x + 4x - x + 20 + 30 + 40 = 360
2x + 90 = 360
2x = 360 - 90
2x = 270
x = 270/2
Los ángulos serían:
∢ (2x + 20) → 2(135) + 20 = 290°
∢ (30 - 3x) → 30 - 3(135) = -375°
∢ 4x = 4(135) = 540°
∢ (40 - x) = 40 - 135 = -95°
290 - 375 + 540 - 95 = 360
290 + 540 - 375 - 95 = 360
830 - 470 = 360
360 = 360
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Respuesta:
x = 135°
Explicación paso a paso:
La suma de todos los ángulos de la figura = 360°
(2x + 20) + (30 - 3x) + 4x + (40 - x) = 360
2x - 3x + 4x - x + 20 + 30 + 40 = 360
2x + 90 = 360
2x = 360 - 90
2x = 270
x = 270/2
x = 135°
Los ángulos serían:
∢ (2x + 20) → 2(135) + 20 = 290°
∢ (30 - 3x) → 30 - 3(135) = -375°
∢ 4x = 4(135) = 540°
∢ (40 - x) = 40 - 135 = -95°
290 - 375 + 540 - 95 = 360
290 + 540 - 375 - 95 = 360
830 - 470 = 360
360 = 360