Question

answer quickly and detailed​

Answer 1

Answer: 644

explanation:

let number be 100x+10y+z

let digits be x,y ,z

x+y+z=12  --------------1

y=(x+z)/2

=>2y=x+z ---------------2

(100x+10y+z)-(100z+10y+x)=198

99x-99y=198

x-y=2  ------------------3

put 2 in  eq 1

2y+y=12

3y=12

y=4

put in eq 2

x-y=2

x=6

now put in eq 1

z+6+4=12

z=4

number is number be 100x+10y+z

=644

Answer 2

Answer:

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