-x+25=2x-2 25m-3=24m-4 17y+28=19y+27 -9z-7=-z-6 8k-19=-8k+19

-x+25=2x-2=- 3x=27 x=-9 25m-3=24m-4= m=-1 17y+28=19y+27= -2y=1= y=0,5 -9z-7=-z-6= -8z=z = -⅛ 8k-19=-8k+19= k=0

-x+25=2x-2 25+2=2x+x 27=3x/3 9=x 25m-3=24m-4 25m-24m=3-4 1m=-1 17y+28=19y+27 28-27=19y-17y 1=2y/2 0,5=y -9z-7=-z-6 -9z+z=7-6 -10z=1/-10 z=-0,1 8k-19=-8k+19 8k+8k=19+19 16k=38/16 k=2,375