问题 解答题
①2x+30%x=9.2  ②25%x+3=16 
③2-x=1.25④x+25%x=8  
⑤200-40%x=120 ⑥x-25%x=60.
答案

①2x+30%x=9.2,

2.3x=9.2,

2.3x÷2.3=9.2÷2.3,

x=4;

②25%x+3=100×6,

25%x+3=600,

25%x+3-3=600-3,

25%x=597,

25%x÷25%=597÷25%,

x=2388;

③2-x=1.25,

2-x+x=1.25+x,

1.25+x=2,

1.25+x-1.25=2-1.25,

x=0.75;

④x+25%x=8,

1.25x=8,

1.25x÷1.25=8÷1.25,

x=6.4;

⑤200-40%x=120,

200-40%x+40%x=120+40%x,

40%x+120=200,

40%x+120-120=200-120,

40%x=80,

40%x÷40%=80÷40%,

x=200;

⑥x-25%x=60,

0.75x=60,

0.75x÷0.75=60÷0.75,

x=80.

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