Х+8=8х-8 . 0.5*х*(х+3)=0,8*(10+х) , (х-2)/5=(х+3)/6
X+8=8x-8 x-8x=-8-8 -7x=-16 x=-16/(-7) x=2.2/7 (x-2)*6 (x+3)*5 -------- - ----------=0 5 6 6x-12-(5x+15) ---------------------=0 30 6x-12-5x-15 -----------------=0 30 x-27 --------=0 30 x-27=0 x=27