(0,0612:0,6-0,4)х0,5+0,5=-0,298х0,5+0,5=0,351
0,4+8,6(0,021:0,01-2,6)=0,4+8,6(2,1-2,6)=0,4-4,3=-3,9
(0,1х0,95-0,275):0,9-0,1=-0,18:0,9-0,1=-0,3
(1,6х0,215-0,215)/(3,45-3,75)=0,129/-0,3=-0,43
(6,25х0,14-1,4)/(1,05-1,25)=-0,525/-0,2=2,625
8/15 - 7/15 + у = 14/15 17/20 - х = 14/20 - 3/20
1/15 + у = 14/15 17/20 - х = 11/20
у = 14/15 - 1/15 х = 17/20 - 11/20
у = 13/15 х = 6/20
х = 3/10
5*(8x+3)-12=83 7*(2x+9)+3x=114 3*(4x+13)-25=74
5*(8Х+3)=83+12 14x+63+3x=114 12x+39=74+25
5*(8Х+3)=95 17x=114-63 12x+39=99
8х+3=95:5 17x=51 12x=99-39
8x+3=19 x=51:17 12x=60
8x=19-3 x=3 x=60:12
8x=16 7*(2*3+9)+3*3=114 x=5
x=16:8 7*15+9=114 3*(4*5+13)-25=74
x=2 114=114 99-25=74
5*(8*2+3)-12=83 74=74
83=83