Question

решите систему уравнений {3x-2y=-19 5x+4y=5

Answer 1

5x+4y=5
5x5+4y5=55
x+0.8y=1
x=1-0.8y
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3(1-0.8y)-2y= -19
3-2.4y-2y= -19
-4.4y= -22
y=224.4
y=5
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x=1-0.8y
x=1-0.8*5
x=1-4
x= - 3
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(-3; 5)