Question

Determine o valor dos incognitas em cada casoa) 3x10° x+30° b) 45° 2X+15° C)115° Y X Ź

Answer 1

a)
3x+10+x+30=180°
4x+40=180
4x=180-40
4x=140
x=140/4
x=35°

b)
45+2x+15=180°
2x+60=180
2x=180-60
2x=120
x=120/2
x=60°

c)
z=115°
y=x
x+115=180
x=180-115
x=65°
y=65°