<span>1) (</span>126<span>+</span>84<span>)/</span>5<span>=42 </span>км<span> (</span>скорость<span>)</span>
<span>2)<span> (</span>126<span>/42=3 </span>часа<span> </span></span>
<span> </span><span>Ответ: 3 </span>часа<span>.</span>
<span>
</span>
<span>
</span>
7х + 4х - 8 >6 + 18x
11x - 8 > 6 + 18x
11x - 18x > 8 + 6
- 7x > 14
7x > - 14
x < - 2