Tanaseelena25ask
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daca a+b=8,13 si  b+c=5,62 , atunci suma 2a+5b+3c este egala cu .....

Răspuns :

Cpwask
2a+5b+3c= 2a+2b+3b+3c=2(a+b)+3(b+c)=2*8.13+3*5.62=16.26+16.86=33.12
Nikolle22ask
b 8,13-5,62=2,51
a 8,13-2,51=5,62
c 5,62-2,5=3,11
2a+5b+3c=2x5,62+5x2,51+3x3,11=11,24+12,55+9,33=33,12
Raspuns:33,12