Question

classifique e resolva se possível:
x+2y=8 2x-y=3​

Answer 1

Resposta:

Explicação passo a passo:

$\left \{ {{x+2y=8} \atop {2x - y=3}} \right. \\\\x + 2y = 8 \\x = -2y + 8\\\\\\2x - y = 3\\2(-2y + 8) - y = 3\\-4y + 16 - y = 3\\-5y = -13\\5y = 13\\y = \frac{13}{5} \\\\\\x + 2y = 8\\x + 2*(\frac{13}{5} ) = 8\\x + \frac{26}{5} = 8\\x = 8 - \frac{26}{5} \\x = \frac{14}{5}$