Найдите решение системы линейных уравнений:
[tex] \left \{ {{x+5y=3} \atop {2x-5y=-6}} \right. [/tex]
[tex] \left \{ {{x+5y=3} \atop {2x-5y=-6}} \right. [/tex]
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X+5y=32x-5y=-6
складываем оба кравнения
x+5y+2x-5y=3-6
3x=-3
x=-1
-1+5y=3
5y=4
y=4/5=0.8
ответ -1 0.8