ответ: x = 19 .
Пошаговое объяснение:
(x-4)/3 + (2x-3)/35 = (5x-32)/9 - (x+9)/28 ;
( 5x - 32 )/9 - ( x - 4 )/3 = ( 2x - 3 )/35 + ( x + 9 )/28 ;
[5x - 32 - 3( x - 4 )]/9 = [ 4( 2x - 3) + 5( x + 9 )]/140 ;
( 2x -20 )/9 = ( 13x + 33 )/140 ;
140( 2x -20 ) = 9 ( 13x + 33 ) ;
280x - 2800 = 117x + 297 ;
280x - 117x = 2800 + 297 ;
163x = 3097 ;
x = 3097 : 163 ;
x = 19 .
199
6) 1/6+1/3= 1/6+2/6=3/6=1/2
5/12+1/4=5/12+3\12=8/12=2/3
2/9+5/18= 4/18+5/18=9/18=1/2
7) 7/20+2/5=7/20+8/20=15/20=3/4
11/30+1/6=11/30+ 5/30=16/30=2/15
3/10+1/2=3/10+5/10=8\10=4/5
8) 5/6-1\3= 5/6-2/6=3/6=1/2
13/20-2/5= 13/20-4\10=9/10
2/3-1/6=4/6-1/6=3/6=1\2
9)8/15-1/5=8/15-3\15=5/15=1/3
11/12-2/3=11/12-8/12=3/12=1/4
11/18-4/9=11/18-8/18=3/18=1/6
10)7/15+1/3=7/15-5/15=2/15
11/12-1/6=11/12-2/12=9/12=3/4
1/7+5/14=2/14+5/14=7/14=1/2
200
4/5-4/15+3/10=24/30-8/30+9/30=25/30=5/6
2/3-3\5-1/15=10/15-9\15-1/15=0/15
5/6-1/2-1/8=20\24-12/24-3/24=5/24
Пошаговое объяснение:
ответ: x= -254 1/9.
Пошаговое объяснение:
x-4/3 + 2x-3/35 = 5x-32/9 - x+9/28;
x+2x-5x+x = 9/28-32/9+3/35+4/3; => НОК (28;9;35;3)=1260;
9x=45*9/1260-32*140/1260+3*36/1260+4*420/1260;
9x=(405-4480+108+1680)/1260;
9x=-2287;
x= -2287/9;
x= -254 1/9.