Question

Raspundeti macar la o problema va rog mult!!!!!

Answer 1

3.a+b=150
180-a=90-b=>180-a-90+b=0,sau,90-a+b=0,sau,a-b=90=>a=90+b
90+b+b=150
2b=60
b=30
a=120

4.2a=2b/3=5c/9
a+b+c=38
Din,primele,doua=>b=3a
Din,ultimele,doua=>c=18a/5
a+3a+18a/5=38
5a+15a+18a=190
38a=190
a=5
b=15
c=18