Rog frumos sa ma ajutati prin metoda grafica....multumesc

Răspuns:
a+b+c=400
a-x=100
b-x=84
c-x=42
100+84+42=226
400-226=174=》x+x+x=174=》x=174÷3=58=》a-58=100; b-58=84; c-58=42 =》a=100+58=158; b=84+58=142; c=42+58=100
a=158; b=142; c=100
Succes!!