Question

dau coroana sa se rezolve ecoatiile scriind ezultatele sub forma de fractie[x imultit 21=50;54imultit x=20;2/3imultit x=20;41/3imultit x;x imultit 1/2=3/4;x/100imultit3=4

Answer 1

x×21=50
x=50/21
54×x=20
x=20/54
2/3×x=20
x=20×3/2
x=60/2
x×1/2=3/4
x=3/4×2/1
x=6/4
x/100×3=4
x/100=4/3
x=4/3×100
x=400/3