Jawabanmu

2014-04-19T17:54:49+07:00
A=3 u4 = 18 a+3b= 18 3+3b = 18 3b = 18-3 3b = 15 b = 5 x = a + b x = 3 + 5 = 8 y = a +2b y = 3 + 2(5) y = 3 + 10 y = 13 nilai x+y=8+13=21 semoga membantu ya..