Dak a+b=33si a+c=11_calculati 5 x a+ 3x b+2 x c

Răspuns :

(a+b)+(a+c) =33+11
2a+b+c=44
a+b=33|×2
2a+2b=66
2a+b+c=44|×2
4a+2b+2c=88|+(a+b)
5a+3b+2c=132
(a+b)+(a+c)=33+11
2a+b+c=44
a+b=33/x2
2a+2b=66
2a+b+2c=88/+(a+b)
5a+3b+2c=132