Question

va rog s a ma ajutati ,este urgent

Answer 1

1)M+A=21CD
M=2×A
2×A+A=21
3A=21=>A=21÷3=7CD
M=2×A=>M=2×7=14CD
2)a+b=40
a=3×b
a+b=40=>3×b+b=40=>4×b=40=>b=40:4=10(al doilea nr)
a=3×10=30(primul nr)
3)a=3×b
c=a+5=>c=3×b+5
a+b+c=75
3×b+b+3×b+5=75=>6b+b+5=75
7b+5=75=>7b=75-5
7b=70=>b=70:7=10
Dacă b=10
a=3×b=>a=3×10=30
c=a+5=>c=30+5=35
4)a+b=32
a=3×b
Dacă a+b=32=>3×b+b=>4b=32
b=32:3=8
Dacă b=8 atunci=>a=3×b=>a=3×8=24