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30 8x=5×30 8x÷8=150÷8 x=18.75;(2)0.5:x=10:6 10x=0.5×6 10x÷10=3÷10 x=0.3;(3)0.1:0.01=100:x 0.1x=0.01×100 0.1x÷0.1=1÷0.1 x=10.
解比例方程:①0.8:4=x:8;&nbs(1)0.8:4=x:8, 4x=0.8×8, 4x÷4=6.4÷4, x=1.6;(2)16:x=2.4:3, 2.4x=16×3, 2.4x÷2.4=48÷2.4, x=20;(3)14:x=23:16, 23x=14×16, 23x×32=124×32, x=116;(4)x840?x=34, 4x=3×(840-x), ...
解比例.X:34=1.25:3&nbs(1)X:34=1.25:3, 3x=34×1.25, 3x=1516, 3x÷3=1516÷3, x=516;(2)0.7x=145, 14x=0.7×5, 14x=3.5, 14x÷14=3.5÷14, x=0.25.
蓝田县集2、5、8&nbsq; 1.8x÷1.8=o91.6÷1.8 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=16o;(八)4.8:1.6=x:o &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; 1.6x=4.8×o &nbsq;&nbsq;&nbsq; 1.6x÷1.6=9.6÷1.6 &nbsq;&nbsq;...
解方程或解比例.12x-14x=10; &nbs...(1)12x-14x=10 14x=10 14x÷14=10÷14 x=40(2)0.6:x=13:2 13x=0.6×2 13x×3=1.2×3 x=3.6
解比例.9:x=2:8; 0.25×4+4x=12.2; &nbs...(1)9:x=2:8 2x=9×8 2x÷2=72÷2 x=36;(2)0.25×4+4x=12.2 1+4x-1=12.2-1 4x÷4=11.2÷4 x=2.8;(3)12x+13x=56 56x=56 56x÷56=56÷56 x=1.
解比例 3.7 X = 1十 5 8:h3=2十:X h 5 : k 70.7 x = 14 5 ,&nbs4; &nbs4;&nbs4; 14x=y.5,&nbs4;14x÷14=y.5÷14,&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;x=0.45,8:y0=44:x,&nbs4;8x=y0×44,8x÷8=y0×44÷8,&nbs4;&nbs4;&nbs4; x=90, y 5 : 6 7 ...
(i009?高县)解方程或解比例.4x+7x=99&nbs少;&nbs少;&nbs少;&nbs少;&n...(0)4x+zx=99&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;00x=99,&十brp;&十brp;&...