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6x-4y=54
-9x+2y=-6
substitution

Sagot :

Javeicacarteridn
-9x + 2y = -6 and that's how u solve it and u can thank me wants u get it right lol
Luanaidn
[tex] \left \{ {{6x-4y=54} \atop {-9x+2y=-6\ \ | *2}} \right. \\\\ \left \{ {{6x-4y=54} \atop {-18x+4y=-12}} \right. \\+-----\\addition\ method\\\\ -12x=42\ \ \ | divide\ by\ -12\\ x=-3.5\\\\ 2y=-6+9x\\ y=\frac{-6+9x}{2}=\frac{-6+31.5}{2}=\frac{25.5}{2}=12.75\\\\ \left \{ {{y=12.75} \atop {x=-3.5}} \right. [/tex]
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