Question

RESOLVA O SISTEMA LINEAR
5x+4y=26
2X-24=15

Answer 1

Resposta:

$\left \{ {{5x+4y=26} \atop {2x-24y=15} \right. \\ \left \{ {{5x+4y=26(2)} \atop {2x-24y=15(-5)}} \right.\\ \left \{ {{10x+8y=52} \atop {-10x+120y=-75}} \right. \\128y=-23\\y=\frac{-23}{128} \\5x+4(\frac{-23}{128})=26\\5x-\frac{23}{32}=26\\5x=26+\frac{23}{32}\\5x=\frac{855}{32} \\x=\frac{171}{32} \\\\(x;y)=(\frac{171}{32}; \frac{-23}{128})$