Jawaban:
1.20N+40 N =60N
60N-25N = 35N
2. 25+30=55-35=20
3. 65-55 = 10
4. 50-45= 5
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Jawaban:
1.20N+40 N =60N
60N-25N = 35N
2. 25+30=55-35=20
3. 65-55 = 10
4. 50-45= 5