Question

Află necunoscutele a,b,c,d din egalitatile:b-a=13; b+c=67; c+d=70; d-12=29.

Answer 1

d - 12 = 29
d = 12 + 29
d = 41

c + d = 70
c + 41 = 70
c = 70 - 41
c = 29

b + c = 67
b + 29 = 67
b = 67 - 29
b = 38

b - a = 13
38 - a = 13
a = 38 - 13
a = 25

Deci : a = 25, b = 38, c = 29, d = 41

Answer 2

D=29+12=41 C+41=70 C=70-41=29 B+29=67 B=67-29=38 38-A=13 A=38-13=25