题目内容

25%x=7560%x-35%x=125
x+15%x=11515x-30=150
8x+42=178x-40%x=120.
①25%x=75,
0.25x÷0.25=75÷0.25,
x=300;

②60%x-35%x=125,
0.25x=125,
0.25x÷0.25=125÷0.25,
x=500;

③x+15%x=115,
1.15x=115,
1.15x÷1.15=115÷1.15,
x=100;

④15x-30=150,
15x=180,
15x÷15=180÷15,
x=12;

⑤8x+42=178,
8x=136,
8x÷8=136÷8,
x=17;

⑥x-40%x=120,
0.6x=120,
0.6x÷0.6=120÷0.6,
x=200;
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