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2014-10-15T15:40:20+03:00
Ax+2bx+3cx=(a+2b+3c)*x=42
a+2b+3c=6
6*x=42
x=7
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2 5 2
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2014-10-15T15:43:10+03:00
Ax+2bx+3cx=42
a+2b+3c=6
x(a+2b+3c)=42
x*6=42
x=42:6
x=7
2 5 2