Question

Află valorile lui a,b,c din egalitatile:a+a=b-1 b+b=c c+c=d d+17=53

Answer 1

d=53-17 d=36 c+c=36 deci c+c=18+18 c=18 b+b=18 b+b=9+9 deci b=9 a+a=9-1 a+a=8 a+a=4+4 a=4

Answer 2

53-17=36(d);
36:2=18(c)
18:2=9(b)
9-1):2=4(a);