Ответ:
7*(4+х) - 4х = 4х - 64;
28 + 7х - 4х = 4х - 64;
28 + 3х = 4х - 64;
28 + 64 = 4х - 3х;
х = 92
Ответ: х = 92
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Ответ:
7*(4+х) - 4х = 4х - 64;
28 + 7х - 4х = 4х - 64;
28 + 3х = 4х - 64;
28 + 64 = 4х - 3х;
х = 92
Ответ: х = 92