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a-4+b-4=27
a+b-8=27
a+b=35----b=35-a
2(a+11)=2(b+11)+6
2a+22=2(35-a+11)+66
2a+22=2(46-a)+6
2a+22=92-2a+6
2a+2a=98-22
4a=76
a=19
x+y = 35 ........(1)
2(x+11) = 2(y+11) +6
2x + 22 = 2y +28
2x-2y = 6
x-y = 3 , y= x-3
subtitusi
x+y = 35
x+ (x-3) = 35
2x -3 =35
2x = 38
x= 19