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x÷2+6.25=3x解方程

2.5

6.25×0.23+17.7×0.625 =6.25×0.23+1.77×6.25 =6.25×(0.23+1.77) =6.25×2 =12.5 x+0.2x=28.8 1.2x=28.8 x=28.8÷1.2 x=24

下午吐了了了了

red

6.25×0.65+5/8×3.4+5×1/8 =6.25×0.65+0.625×3.4+0.625 =0.625×6.5+0.625×3.4+0.625 =0.625×(6.5+3.4+1) =6.25

x÷1.5-1.25=0.75 4x-1.3×6=2.6 20-9x=1.2×6.25 6x+12.8=15.8 150×2+3x=690 2x-20=4 3x+6=18 2(2.8+x)=10.4 (x-3)÷2=7.5 13.2x+9x=33.3 3x=x+100 x+4.8=7.2 6x+18=48 3(x+2.1)=10.5 12x-9x=8.7 13(x+5)=169 2x-97=34.2 3.4x-48=26.8 42x+25x=134 ...

5(3+x×6)=6.25 3+6x=6.25/5 6x=1.25-3 x=-1.75/6 x=-175/600 x=-7/24

解:25x=15 x=15÷25 x=3/5

5x×2.5=6.25(两边同时÷2.5) 5x=2.5 x=2.5/5 x=0.5

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