А
(3x+1)/3+(4x-5)/6=1/2 /*6
2(3x+1)+(4x-5)=3
6x+2+4x-5=3
10x=3+3
10x=6
x=6:10
x=0,6
б
(4x-3)/10-(7x-2)/15)=-3/5 /*30
3(4x-3)-2(7x-2)=-3*6
12x-9-14x+4=-18
-2x=-18+5
-2x=-13
x=-13:(-2)
x=6,5
в
(9-5x)/8+(4-9x)/16=3/4 /*16
2(9-5x)+(4-9x)=3*4
18-10x+4-9x=12
-19x=12-22
-19x=-10
x=10/19
г
(8x-5)/25-(8-5x)/10=17/50 /*50
2(8x-5)-5(8-5x)=17
16x-10-40+25x=17
41x=17+50
41x=67
x=67/41
x=1 26/41