Вопрос школьника по предмету Математика
решить неравенство
19-7x >20-3(x-5)
Ответ учителя по предмету Математика
19 — 7x > 20 — 3( x — 5 )
19 — 7x > 20 — 3x + 15
19 — 7x > 35 — 3x
7x — 3x < 19 — 35
4x < — 16
X < — 4
( — бесконечность ; — 4 )
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