Ответ:
X × 5 + 170 =520
X × 5 = 520 - 170
X × 5 = 350
X = 350 ÷ 5
X = 70
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Ответ:
X × 5 + 170 =520
X × 5 = 520 - 170
X × 5 = 350
X = 350 ÷ 5
X = 70