a+b+c=198
b-c=123
2a+b+3c=?
dau coroana ajutatima​


Răspuns :

B-c=123 => b=c+123

A+c+123+c+123=198

A+2c+246=198

A+2c=198-246

A+2c=-48

2a+4c=2a+b-123+3c= -48•2=-96 => 2a+b+3c=-96 -123

= -219

Sper ca te-am ajutat