#17x-2=3x+67x-3x=6+24x=8:4x=2#210(x-9)=710x-90=710x=7+9010x=97:10x=9,7#38-5(2x-3)=13-6x8-10x+15=13-6x-10x+6x=13-15-8-4x=-10:(-4)x=2,5#49-2(-4x+7)=79+8x-14=78x=8+14-98x=13:8x=1 5/8#5-x-2+3(x-3)=3(4-x)-3-x-2+3x-9=12-3x-3-x+3x+3x=9+9+25x=20:5 x=4#68+5(2x-3)=13-6x8+10x-15=13-6x10x+6x=13+15-816x=20:16x=1,25#7-4+x/5=x+4/2|*10-40+2x=10x+202x-8x=20+40-6x=60:(-6) x=-10#82x²-x-1=x²-5x-(-1-x²)2x²-x-1=x²-5x+1+x²2x²-x-x²-x²+5x=1+14x=2:4x=0,5