х+8=8х-8 . 0.5*х*(х+3)=0,8*(10+х) , (х-2)/5=(х+3)/6

x+8=8x-8x-8x=-8-8-7x=-16x=-16/(-7)x=2.2/7(x-2)*6     (x+3)*5--------   - ----------=0    5              66x-12-(5x+15)---------------------=0        306x-12-5x-15-----------------=0          30x-27--------=0  30x-27=0x=27