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## Sagot :

x=6/y......1

3x+2y=12

from1

3*(6/y)+2y=12

{after solving}2y^2-12y+18=0

y^2-6y+9=0 {taking y common}

y^2-3y-3y+9=0

y(y-3)-3(y-3)=0

y=3,3............2

putting 2 in 1

x=2.........3

9x^2+4y^2=

from 2 and 3

9*4+4*9=36+36=

**72**