Question

Me ajudem na 5 plsss

Answer 1

$\left \{ {{5x+3y=21} \atop {2x - 3y=14}} \right. \\ \\5x=21 \\ x = \frac{21}{5} \\ \\ 2x - 3y = 14\\ 2(\frac{21}{5} )-3y=14\\\frac{42}{5} -3y=14\\ \frac{42}{5}-3y-\frac{42}{5}=14-\frac{42}{5}\\-3y=\frac{28}{5}\\ y=-\frac{28}{15}$