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Rezolvati prin metoda sunstitutiei sistemele: sistem: √2x -3y=-7 x+4y=√2+12

Răspuns :

√2x -3y=-7      x=(-7+3y)/√2      x=(-7√2+3y√2)/2
x+4y=√2+12

(-7√2+3y√2)/2+4y=√2+12
-7√2+3y√2+8y=2√2+24
3y√2+8y=2√2+24+7√2
y(3√2+8)=9√2+24
y=
(9√2+24)/(3√2+8)
y=3
(3√2+8)/(3√2+8)
y=3
x=√2+12 -4y =√2+12 -12 =√2

x=√2
y=3