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Sagot :
answer: x=-1 , y=3
x=-2y+5 —> x+2y=5 ——1)
-8x-3y=-1 ————2)
1) x 8,
8x+16y=40————3)
3)+2),
8x+16y-8x-3y=40-1
13y=39
y=39/13
y=3
substitute to 1),
x+(2x3)=5
x=5-6
x=-1
x=-2y+5 —> x+2y=5 ——1)
-8x-3y=-1 ————2)
1) x 8,
8x+16y=40————3)
3)+2),
8x+16y-8x-3y=40-1
13y=39
y=39/13
y=3
substitute to 1),
x+(2x3)=5
x=5-6
x=-1
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