Question

Vă roggggg!!! Exercitiul de mai jos

Answer 1

Răspuns:

a+b+c+d=420

b=40+a

c=40+b=>c=40+(40+a)=40+40+a=80+a

c=d-40=>d=c+40=>d=(80+a)+40=80+a+40=120+a

a+40+a+80+120+a=420

4a+40+80+120=420

4a+240=420

4a=420-240

4a=180

a=180:4

a=45

b=40+a=>b=40+45=>b=85

c=80+a=>c=80+45=>c=125

d=120+a=>d=120+45=>d=165

R:a=45

b=85

c=125

d=165

Sper ca te-am ajutat!!!