Question

48+12÷a=54 72÷b+28=100

Answer 1

48+12÷a=54
12÷a=54 - 48
12÷a= 6
а =12÷6
а=2
____

72÷b+28=100
72÷b=100 - 28
72÷b=72
b=72÷72
b=1
_____

Answer 2

48+12 : a= 54
12: a=54-48
12:a= 6
a=12:6
a=2

Answer 3

спасибо