Question

oblicz jaka liczbe zastepuje litera
65-a=26
b+72=100
15*c=60
d/7=12

Answer 1

-a=26-65
-a=-39
a=39

b=100-72
b=28

15c=60
c=4

d/7=12
d=84

Answer 2

65- 26 = 39
100-72=28
60:15 = 4
7*12= 84