Ответ:
15,8×5,3-15,8×х+3,5=8,24
87,24-15,8×х=8,24
15,8×х=87,24-8,24
15,8×х=79
х=79:15,8
х=5
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Verified answer
Ответ:
15,8×5,3-15,8×х+3,5=8,24
87,24-15,8×х=8,24
15,8×х=87,24-8,24
15,8×х=79
х=79:15,8
х=5