<span>3х+у=2 </span>
<span>х+2у=-6</span>
<span>у=2-3х</span>
<span>х+2(2-3х)= -6</span>
<span>х+4-6х= -6</span>
<span>-5х=-10</span>
<span>х=2</span>
<span>у= -4</span>
<span>Ответ: (2; -4)</span>
Ответ:
-3
Объяснение:
5x+7=-8
5x+7-7=-8-7
5x=-15
x=-3