Jawab.....................

2x+1 + 4x+5 = 180
6x + 5 = 180
6x = 175
x = 175/6

2x + 1 + 4x + 5= 180
2x + 4x + 1 + 5 = 180
6x +6 =180
6x = 180 - 6 = 174
x = 174 : 6 = 29

< SPR = 2(29) +1
= 58 + 1 = 59
< RPQ = 4(29) + 5
= 116 + 5 = 121

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