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Ðåøàåì óðàâíåíèå 45 – õ = 31. Çäåñü special-edu.kz.

íåèçâåñòíî âû÷èòàåìîå.

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×òîáû íàéòè íåèçâåñòíîå âû÷èòàå-

ìîå, íóæíî èç êîðíÿ óìåíüøàåìîãî

âû÷åñòü çíà÷åíèå ðàçíîñòè.

Îòâåò: õ =14 – óðàâíåíèÿ.

Ïðîâåðêà:

(45 – 14)•3 = 93 – ðàâåíñòâî âåðíîå,
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òàê êàê 31•3 = 93, 93 = 93.

Ïðèìåð 2.

(x – 13): 7 = 2,

õ – 13 = 7 • 2,

õ – 13 = 14,

õ = 14 + 13,
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õ = 27.

Ðåøåíèå.

 çàäàííîì óðàâíåíèè íåèçâåñòíî äå-

ëèìîå õ – 13.

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