Question

A + B = 10 kg
C + B = 20 kg
A + C = 24 kg
A + B + C = ? kg

Answer 1

A+B=10
A=10-B
C+B=20
C=20-B
A+C=24
10-B+20-B=24
30-2B=24
-2B=24-30
-2B=-6
B=3
A=10-B
A=10-3=7
C=20-B
C=20-3=17
Maka A+B+C = 7+3+17=27
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