Ловите
-3/(xy)=x
-3=yx^2
y=-3/x^2
Удачи!
1)500-46=454
2) 454+569=1023
X-11/2=7/9*1/14, x-11/2=1/18, x=11/2+1/18 = 100/18=50/9, 2) x+23/4=111/8*5/7 ,x=555/56-23/4= (555-322)/56=233/56 3)2/3x+14= 44/9:5/27=44/9*27/5 2/3x+14=132/5 2/3x=132/5-14 ,2/3x=62/5 , x=62/5:2/3 =91/5=18.2.