1) 0,3x+8=2 0.3x=2-8 0.3x=-6 x=-6/0.3 x = -202) 4-x=1+4x -x-4x=1-4 -5x=-3 x=-3/(-5) x = 0.63) 7-2(x+3)=9-6x -2x+6x=9-7+6 4x=8 x=8/4 x = 24) 4(x-0.5)-2(x+0.3)=-2.6 4x-2x = -2.6+2+0.6 2x = 0 x=0/2 x = 05) 0.4x-6= -12 0.4x = -12+6 0.4x = -6 x = -6/0.4 x = -156) x+6=5+4x x-4x=5-6 -3x = -1 x = -1/(-3) x = 1/37) 13-3(x+1) = 4-5x -3x +5x = 4-13+3 2x = -6 x = -6/2 x = -38) 0.2(3x-5)-0.3(x-1) = -0.7 0.6x - 0.3x = -0.7+1-0.3 0.3x = 0 x = 0/0.3 x = 0 1) (7y-2)/(5y-4)>2 (7y-2 -2(5y-4)) / (5y-4) > 0 1) случай {7y-2-10y+8 > 0 {-3y>-6 {y<-6/(-3) {y < 2 0.8 < x < 2 {5y-4 > 0 {5y > 4 {y>4/5 {y > 0.8 2)случай {7y-2-10y + 8<0 {-3y<-6 {y>-6/(-3) {y > 2 Пустое множество {5y-4 < 0 {5y < 4 {y<4/5 {y < 0.8Ответ. ( 0,8; 2) 2) 8y+2 -(5y+3) > 5 8y - 5y > 5-2+3 3y > 6 y > 6/3 y > 23) 3*(2y+1.5)-(3+2y+1.5) > 8 6y-2y > 8-4.5+4.5 4y > 8 y> 8/4 y > 24) 4*(3y-0.5) - 4 -3y-0.5 >3.5 12y - 3y < 3.5 +2+4+0.5 9y < 10<span> y < 10/9</span>