Ответ:
4х 7х (7х-4х) 8х 3х+40
4х+7х+3х+8х+3х+40=540
25х=500
Х=20
3*20=60
Ответ 60
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Ответ:
4х 7х (7х-4х) 8х 3х+40
4х+7х+3х+8х+3х+40=540
25х=500
Х=20
3*20=60
Ответ 60