Tìm x a) x * 1 1/2 = 1 4/5 - 2/5 b) x * 0,75 + x * 0,25 = 5
Giải thích
a)
x×112=145−25x×32=95−25x×32=75x=75:32x=1415
b)
x×0,75+x×0,25=5x×0,75+0,25=5x×1=5x=5:1x=5
a)
x×112=145−25x×32=95−25x×32=75x=75:32x=1415
b)
x×0,75+x×0,25=5x×0,75+0,25=5x×1=5x=5:1x=5