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5x + x + 26 + 3x + 19= 180
6x + 3x + 26 + 19= 180
9x + 45= 180
9x= 180 - 45
9x= 135
x= 135/9
x= 15
b)
Besar sudut :
5x
5(15)
75°
x + 26
15 + 26
41°
3x + 19
3(15) + 19
45 + 19
64°
180 = 5x + x + 26 + 3x + 19
180 = 9x + 45
9x = 180 - 45
9x = 135
x = 15
b).
( 5x )° = 75°
( x + 26 )° = 41°
( 3x + 19 )° = 64°