(12x - 5x) · 4 = 252 | ÷ 4
7x = 63
x = 63 ÷ 7
x = 9
ОТВЕТ: 9
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(12x - 5x) · 4 = 252 | ÷ 4
7x = 63
x = 63 ÷ 7
x = 9
ОТВЕТ: 9