Question

{3x-4y=2
5x-2y=6
системная уравнения
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Answer 1

$left { {{3x-4y=2} atop {5x-2y=6}} right. left { {{3x-4y=2} atop {2y=5x-6}} right. left { {{3x-2(5x-6)=2} atop {2y=5x-6}} right. left { {3x-10x+12=2} atop {2y=5x-6}} right. left { {-7x=2-12} atop {2y=5x-6}} right.$$left { {-7x=-10} atop {2y=5x-6}} right. left { {x= frac{10}{7}=1frac{3}{7} } atop {2y=5x-6}} right. left { {x= frac{10}{7}=1frac{3}{7} } atop {y= frac{5x-6}{2}= frac{5* frac{10}{7}-6 }{2} = frac{50-42}{14}=frac{8}{14}=frac{4}{7} }} right.$