Предмет: Математика, автор: Misha12344567

A+12 больше, чем 18-a при a=

Misha12344567: Помогите. Срочно надо!

Ответы

Автор ответа: lidochka085

Ответ:

Пошаговое объяснение:

a+12>18-a

a+a>18-12

2a>6

a>3

Автор ответа: Аноним

Ответ:

$a > 3$ или $a\in(3;+\infty)$

Пошаговое объяснение:

Если а+12 больше чем 18-а, то запишем неравенство, где а - некоторое число (которое нам надо найти)

$a+12>18-a\\a+12+a>18-a+a\\a+a+12>18\\2a+12>18\\2a+12-12>18-12\\2a>6\\a>3$

То есть нам подходят любые а, которые больше 3

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