Question

ajutorrrrrrrrrrrrrrr vreau metoda grafica

Answer 1

Ok..deci mai multa mate pe azi...

2. a+b=38
b=a+4
a|----------| }
b|----------|--| } 38dm
4dm
2a=38-4=34dm
a=34÷2
a=17
b=17+4=21dm
P=21+17=38✓

2.a+b=101
a-b=33=>a=b+33

33
a|-----------|---| )
b|-----------| ) 101

2b=101-33
2b=68

b=68:2
b=34

a=34+33
a=67

P=67+34=101✓

4.a+b=104
a-b=8=>a=b+8

a|---------|---|
8


b|---------| (astea impreuna fac 104)

2b=104-8
2b=96
b=96÷2
b=48

a=48+8
a=56

P: 48+56=104✓