42/16=21/13, 35/77=5/11, 48/60=4/5, 72/96=8/12=2/3, 56/70=8/10=4/5
72/90=36/45=4/5, 60/105=4/7, 45/150=3/10, 84/120=21/30=7/10,
96/100=24/25
<span>1)86-49:(2х-5)=79
</span>49:(2х-5)=7
2х-5=7
2х=12
х=6
2)<span>(18+5х):11=3
</span>18+5х=33
5х=15
х=3
3)<span>51:(4у-9)=17
4у-9=3
4у=12
у=3</span>
6* 1/3 x - 6*1 + 2*3 - 2*1,5x = 2x-6+6-3x=(2x-3x)+(-6+6)=-x+0=-x