-9х+8=-10-2
-9х+8=-8
-9х=-8-8
-9*х=0
х=9/0
х=0
1. 240 ÷ 7 = 34 ( остаток 2 ) проверка 34 × 7 + 2 = 240
2. 386 ÷ 6 = 64 ( остаток 2 ) проверка 64 × 6 + 2 = 386
3. 482 ÷ 3 = 160 ( остаток 2 ) проверка 160 × 3 + 2 = 482
7 <= 2х+3 <span><= 11
</span>7-3 <= 2х <span><= 11-3
</span>4 <= 2х <span><= 8
</span>4 : 2 <= х <span><= 8 : 2
</span>2 <= х <span><= 4</span>
1) 10ч5мин
2) 2ч30мин
3) 5ч50мин