问题
解答题
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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.