Ответ:
4,5x-54=72+x
4,5x-x=72+54
3,5x=126
x=36
4,5x-54=72+х
x=126:3,5
Ответ: 36.
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Ответ:
4,5x-54=72+x
4,5x-x=72+54
3,5x=126
x=36
4,5x-54=72+х
4,5x-x=72+54
3,5x=126
x=126:3,5
x=36
Ответ: 36.