А - А - A = 20
B - B - B = 15
C - C - C = 25
A + B + C = ??
B - B - B = 15
C - C - C = 25
A + B + C = ??
Comments
A+B+C=-60
B = -15
C = -25
A + B + C = -60
B= -15
C= -25
A+B+C= -60