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determinati x stiind ca ax + 2bx +3cx egal 42 si a +2b +3c egal 6

Răspuns :

x(a+2b+3c)=42
x*6=42
x=42:6
x=7
ax+2bx+3cx=42
x(a+2b+3c)=42
6x=42
x=42:6
x=7