помогите умоляю)!!!4(100- x)=5(x-1) найдите кореь уравнения
4(100-х)=5(х-1)
400-4х=5х-5
5х+4х=400+5
9х=405
х=405:9
х=45
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4(100-х)=5(х-1)
400-4х=5х-5
5х+4х=400+5
9х=405
х=405:9
х=45
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