Помогите y:1,2=1 2/3
0,6x=9/20
5/6y=0,5

у÷1,2=1ц2/3у=1ц2/3×1,2у=5/3×1ц2/10у=5/3×12/10у=60/30у=20.6х=9/20х=9/20÷6/10х=9/20×10/6х=90/120х=3/45/6у=0,5у=1/2÷5/6у=1/2×6/5у=6/10=3/5