<span>(22 : 2 — 2 : 2) * (22 : 2 — 2 : 2)</span>
<span>1.)9х-7=6х+14</span>
<span>9х-6х=14+7</span>
<span>3х=21</span>
<span>х=21:3</span>
<span>х=7</span>
<span><span>2) (12у+18)(1.6-0.2у)=0</span></span>
<span><span>12у+18=0 1,6-0,2у=0</span></span>
<span><span>12у=-18 -0,2у=-1,6</span></span>
<span><span>у=-18:12 у=-1,6:(-0,2)</span></span>
<span><span>у=-1,5 у=8</span></span>
59=bх6+5
6b=59-5
6b=54
b=9
Проверка 59=9х6+5
59=59
105 минут, 1 час = 60 минутам, 60 минут + 45 минут = 105 минут