A+B = 10 B+C = 12 A+C=15 A? B? C? Dan A +B+C=?? tolong jawab beserta cara..
tonotonsiloyof66
A + B = 10 B + C = 12 ----------------------- + A + 2B + C = 22 A + C = 15 ----------------------- - 2B = 7 B = 7/2 = 3,5 Maka : A + B = 10 A = 10 - 3,5 = 6,5 dan B + C = 12 C = 12 - 3,5 = 8,5 Jadi : A+B+C = 6,5+3,5+8,5 = 18,5
B + C = 12
----------------------- +
A + 2B + C = 22
A + C = 15
----------------------- -
2B = 7
B = 7/2 = 3,5
Maka : A + B = 10
A = 10 - 3,5 = 6,5
dan B + C = 12
C = 12 - 3,5 = 8,5
Jadi : A+B+C = 6,5+3,5+8,5 = 18,5