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5x>0-10
5x>-10
x>10/5
x> -2
3. 3x-4= 2
3x= 2 +4
3x = 6
x= 6/3
x = 2
4. x+1 < 2
-2<x+1<2
-2-1<x<2-1
-3<x<1
5. jika lisa = A
jogi= B
Hafiz= c
A+B= 99 kg
B+C= 101 kg
A+C= 102 kg
B+C= 101
B= 101-C
A+B= 99
A+(101-C)=99
A-C= 99-101= -2
A+C=102
A-C= -2
_________-
2C=104
C= 52 (HAFIZ)
A+C=102
A-C= -2
_________+
2A=100
A= 50 (LISA)
A+B= 99
50+B=99
B=99-50
B=49 (JOGI)