Question

daca 4a+b=83 si 2a+3b= 59, care este a care este b

Answer 1

Răspuns:

4a+b=83--->b=83-4a

2a+3b=59---->2a+3(83-4a)=59--->2a+249-12a=59--->-10a+249=59--->-10a=-190--->a=19

b=83-4a--->b=83-4×19--->b=83-76--->b=7