1)4x+10.4x=13.6 2)12x=2.4 3) 6x-16=30 4)12x-4(8x-2)=14 5)0.4x-0.2(2x-6)=1.2 6)xквадрат=16 7)10xквадрат=20 8)2xквадрат-16=0

1)4x+10.4x=13.6 14.4x=13.6 x=13.6:14.4 13 6/10=13 3/5=68/5 14 4/10=14 2/5=72/5 x=68/5×5/72=34/36=17/18 2)12x=2.4 x=2.4:12 x=0.2 3) 6x-16=30 6x=30+16 6x=46 x=46:6 x=7 4/6=7 2/3 4)12x-4(8x-2)=14 12x-32x+8=14 -20x=14-8 -20x=6 x=6:(-20) x= - 0.3 5)0.4x-0.2(2x-6)=1.2 0.4x-0.4x+1.2=1.2 1.2=1.2 6)xквадрат=16 x^2=16 x=√16 x=4 7)10xквадрат=20 10x^2=20 x^2=20:10 x^2=2 x=√2 8)2xквадрат-16=0 2x^2-16=0 2x^2=16 x^2=16:2 x^2=8 x= √8