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( 17/10+7-8,7) : (23/4 -11/2+ 9/25)x(12,98x0,25)+12,5
=0: (23/4 -11/2+ 9/25)x(12,98x0,25)+12,5
=0+12,5
=12,5
tich dung cho minh nha
![](https://rs.olm.vn/images/avt/0.png?1311)
(17/10 + 7 - 8,7) : (23/4 - 11/2 + 9/25) x (12,98 x 0,25) + 12,5
= (1,7 + 7 - 8,7) : (23/4 - 11/2 + 9/25) x (12,98 x 0,25) + 12,5
= (8,7 - 8,7) : (23/4 - 11/2 + 9/25) x (12,98 x 0,25) + 12,5
= 0 : (23/4 - 11/2 + 9/25) x (12,98 x 0,25) + 12,5
= 0 + 12,5
= 12,5
![](https://rs.olm.vn/images/avt/0.png?1311)
25% nhân X+X+X nhân 1,25 =12,5
25%nhân X+X+X =12.5 chia 1,25
25% nhân X nhân 3 =10
X nhân 3 =10 chia 25%
X nhân 3 =40
X =40 chia 3
X =13,3333.....................
ttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(y\times12,5=150\Leftrightarrow y=150:12,5\Leftrightarrow y=12\)
`;=:?`
la sao vay ban