Question

a+a=b
b+2=c
c:6=d
d+d=60
prin metoda mersului invers​

Answer 1

Răspuns:

d+d=60

2d=60

d=30

c=30*6

c=180

b=180-2=178

2a=178

a=89

Answer 2

d+d= 60 => 2d=60 => d=30
c:6=d => c:6=30 => c= 180
b+2=c => b+2=180 => b=178
2a=b => 2a=178 => a=89