-2/7*1,4=-2/7*14/10=-2/7*7/5=-2/5
чертишь график для первого
<span>а) y=5x-1</span>
<span> x+3y=5 </span>
<span>у=5х+1</span>
<span>х+15х-3=5</span>
<span>у=5х+1</span>
<span>16х=8</span>
<span>у=5х+1</span>
<span>х=0,5</span>
<span>у=2,5-1</span>
<span>у=1,5</span>
<span>Ответ: (0,5;1,5)</span>
<span>б) 4x+y=3/*2</span>
<span> 6x-2y=1</span>
<span> 8х+2у=6</span>
<span>+</span>
<span> <u>6х-2у=1</u></span>
14х=7
х=0,5
2+у=3
у=1
Ответ: (0,5;1)
Ставь лучшим!)))
1.64x2-1-64x2-16x+12x-3=0
-4x=4
x=-1