please solve hots questions . 1st questions answer is 9 and 2nd question answer is -47 divided by14
Attachments:
Answers
Answered by
2
Let no is X
So average is X-6
X/2+X/3+X/6÷3 =X -6
X/3=X -6
X =3X-18
-2X=-18
X=9
X^2-3X-28/X^2- 49 =3/17
X^2-7X+4X-28/X^2-7^2 =3/17
X ( X - 7 ) +4 ( X - 7 ) / ( X +7 ) ( X - 7 ) =3/17
( X +4 ) ( X - 7 ) / ( X +7 ) ( X - 7 ) =3/17
( X +4 ) / ( X +7 ) =3/17
17 ( X +4 ) = 3 ( X +7 )
17 X + 68 = =3 X + 21
17 X - 3 X = 21 - 68
14 X = - 47
X = - 47 / 14
So average is X-6
X/2+X/3+X/6÷3 =X -6
X/3=X -6
X =3X-18
-2X=-18
X=9
X^2-3X-28/X^2- 49 =3/17
X^2-7X+4X-28/X^2-7^2 =3/17
X ( X - 7 ) +4 ( X - 7 ) / ( X +7 ) ( X - 7 ) =3/17
( X +4 ) ( X - 7 ) / ( X +7 ) ( X - 7 ) =3/17
( X +4 ) / ( X +7 ) =3/17
17 ( X +4 ) = 3 ( X +7 )
17 X + 68 = =3 X + 21
17 X - 3 X = 21 - 68
14 X = - 47
X = - 47 / 14
Similar questions