Toán Lớp 7: $\frac{1}{5}$ +$\frac{4}{5}$ :x=0,75
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Toán Lớp 7: $\frac{1}{5}$ +$\frac{4}{5}$ :x=0,75
Comments ( 2 )
=>1/5+4/5:x=75/100
=>1/5+4/5:x=3/4
=>4/5:x=3/4-1/5
=>4/5:x=15/20-4/20
=>4/5:x=11/20
=>x=4/5:11/20
=>x=4/5. (20)/11
=>x=16/11
Vậy x=16/11