100/17 nhé bạn
k mình nhé
mình là bạn mà
90 . x + x .80 = 1000
(90+80).x=1000
170.x=1000
x=1000:170
x=100/17
90.X+X.80=(90+80)X=170X=1000=>X=100/17
90 . x + x . 80 = 1000
90 . x + 80 . x = 1000
(90 + 80) . x = 1000
170 . x = 1000
x = 1000 : 170
x = \(\frac{100}{17}\)
90.x +x.80+1000
<=>1000=x.(90+80)
<=>x=1000:170
Vậy x=0,17