Решите уравнение: 1)0,9х-0,6(х-3)=2(0,2х-1,3) 2)-0,4(3х-1)+8(0,8х-0,3)=5-(3.8х+4) 3)4/7(0,56-4,2у)+0,4=5/13(0,52-6,5у)

1)0.9х-0.6х+1.8=0.4х-2.60.3х+1.8=0.4х-2.60.4х-0.3х=1.8+2.60.1х=4.4х=4.4÷0.1х=442)-1.2х+0.4+6.4х-2.4=5-3.8х-45.2х-2=1-3.8х5.2х+3.8х=1+29х=3х=3÷9х=1/33)4/7(56/100-4 2/10у)+4/10==5/13(52/100-6 5/10у)4/7(14/25-4 1/5у)+2/5==5/13(13/25-6 1/2у)4/7(14/25-21/5у)+2/5==5/13(13/25-13/2у)8/25-12/5у+2/5=1/5-5/2у-12/5у+5/2у=1/5-8/25-2/5-24/10у+25/10у=5/25-8/25-10/251/10у=-13/25у=-13/25÷1/10у=-13/25×10/1у=-26/5=-5 1/5