Răspunsuri

  • Utilizator Brainly
2014-02-25T16:32:16+02:00
100-[285-6x(5xa-25):9]:5=43 
100-[285-(30a-150):9]:5=43
100-(285-10a/3+50/3):5=43
100-(905/3-10a/3):5=43
100-181/3+2a/3=43
2a/3-181/3=-57
2a-181=-171
2a=10
a=5