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1) 10 + 40 + 20 = 70 (деталей) - было в коробке;
Ответ: 70 деталей.
3х-х=25+45
2х=70
х=70:2
х=35
<span>2980*(423+168)-(57*17-209)*6:3+533700:9=1818960</span>
<span>1) 423+168 = 591</span>
<span>2) 2980*591=1761180</span>
<span>3) 57*17 = 969</span>
<span>4) 969-209=760</span>
<span>5) 760*6:3 = 760*2 = 1520</span>
<span>6) 533700:9=59300</span>
<span>7)1761180-1520=1759660</span>
<span>8) 1859660+59300=1818960</span>
4 3 40 21 19
___- ___ = ___ - ___ = ___
7 10 70 70 70
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