(7y-93):48:8=24:12
(7y-93):48:8=2
7y-93=2*48*8
7y-93=768
7y=768+93
7y=861
y=861/7
y=123
<span>67343-x=6309÷9
</span><span>67343-x=701
</span>x=67343-<span>701
</span><span>x=66642
</span>Проверка:
67343-66642=701
701 =701
Ответ: <span>x=66642</span>
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</span>
2/5x + 3/25x = 1/3 - 2/3
13/25x = - 1/3
13x / 25 = - 1/3
13x × 3 = - 1 × 25
39x = - 25
x = - 25/39