Question

ayuda porfa doy 28puntos

Answer 1

1.

abc.999=....123

(1-9)(2-9)(3-10)

877=abc

8+7+7=22

2.

ab.a=504------------------------ab.b=144

a(10a+b)=504---------------b(10a+b)=144

(10a+b)=504/a----------->b(504/a)=144

a/b=504/144-----simplificar

a/b=7/2

a=7

b=2

722x72=51984----->5+1+9+8+4=27

3.

766(N).113(N)=xyy66(N)

N=9

766(9)x113(9)=87766

x=8;y=7;N=9

8+7+9=24