Question

a-b=45
a:b= 4 rest9
ajutor nu ma descurc cu deastea

Answer 1

a:b = 4 rest 9  ⇒ a = 4b+9
4b +9 - b = 45
3b+9 = 45
3b  = 45-9
3b = 36
b = 12
a= 45+12
a = 57

Answer 2

a=b×4+9
a=4b+9
4b+9-b=45
3b+9=45
3b=45-9
3b=36
b=36÷3
b=12
a=4×12+9
a=57