Решите СИСТЕМУ УРАВНЕНИЙ
1) 2х+5у=1-х+2у
14х-5=9х-3у-2
(1/2 (одна вторая) х)
2) 1/2 х+3у=1,5
0,5х-2у=4
Ответы
Ответ дал:
0
1)
![left { {{2x+5y=1-x+2y} atop {14x-5=9x-3y-2}} right. \
left { {{2x+x=-5y+1+2y} atop {14x-9x=5-3y-2}} right. \
left { {{3x+3y=1} atop {5x+3y=3}} right. \
left { {{-3x-3y=-1} atop {5x+3y=3}} right. \
left { {{x=1} atop {y=- frac{2}{3} }} right. \
2) \
0,5= frac{1}{2} \
left { {{0,5x+3y=1,5} atop {0,5x-2y=4}} right. \
left { {{-0,5x-3y=-1,5} atop {0,5x-2y=4}} right. \
left { {{y=-0,5} atop {x=6}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7B2x%2B5y%3D1-x%2B2y%7D+atop+%7B14x-5%3D9x-3y-2%7D%7D+right.+%5C%0A+left+%7B+%7B%7B2x%2Bx%3D-5y%2B1%2B2y%7D+atop+%7B14x-9x%3D5-3y-2%7D%7D+right.+%5C%0A+left+%7B+%7B%7B3x%2B3y%3D1%7D+atop+%7B5x%2B3y%3D3%7D%7D+right.+%5C%0A+left+%7B+%7B%7B-3x-3y%3D-1%7D+atop+%7B5x%2B3y%3D3%7D%7D+right.+%5C%0A+left+%7B+%7B%7Bx%3D1%7D+atop+%7By%3D-+frac%7B2%7D%7B3%7D+%7D%7D+right.+%5C%0A2%29+%5C%0A0%2C5%3D+frac%7B1%7D%7B2%7D+%5C%0A%0Aleft+%7B+%7B%7B0%2C5x%2B3y%3D1%2C5%7D+atop+%7B0%2C5x-2y%3D4%7D%7D+right.+%5C%0A+left+%7B+%7B%7B-0%2C5x-3y%3D-1%2C5%7D+atop+%7B0%2C5x-2y%3D4%7D%7D+right.+%5C%0A+left+%7B+%7B%7By%3D-0%2C5%7D+atop+%7Bx%3D6%7D%7D+right.+ "left { {{2x+5y=1-x+2y} atop {14x-5=9x-3y-2}} right. \
left { {{2x+x=-5y+1+2y} atop {14x-9x=5-3y-2}} right. \
left { {{3x+3y=1} atop {5x+3y=3}} right. \
left { {{-3x-3y=-1} atop {5x+3y=3}} right. \
left { {{x=1} atop {y=- frac{2}{3} }} right. \
2) \
0,5= frac{1}{2} \
left { {{0,5x+3y=1,5} atop {0,5x-2y=4}} right. \
left { {{-0,5x-3y=-1,5} atop {0,5x-2y=4}} right. \
left { {{y=-0,5} atop {x=6}} right.")
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