(160*5-25*4):7-3xX=40
97xX=40
X=97:40
X=2.245
mong bạn đánh giá kq của mình ^^
( 160 \(\times\) 5 - 25 \(\times\) 4 ) \(\div\) 7 - 3 \(\times\) \(x\) = 36 \(\times\) 25 \(\div\) 9 - 60
( 800 -100) \(\div\) 7 - 3 \(\times\) \(x\) = 900 \(\div\) 9 - 60
700 \(\div\) 7 - 3 \(\times\) \(x\) = 100 -60
100 - 3 \(\times\) \(x\) = 40
3 \(\times\) \(x\) = 100 - 40
3 \(\times\) \(x\) = 60
\(x\) = 60 \(\div\) 3
\(x\) = 20