Question

3x + 8y= 12
20x-8y= 12​

Answer 1

$\left \{ {{3x+8y=12} \atop {20x-8y=12}} \right.$

$23x=24$

$x=\frac{24}{23}$

$3.\frac{24}{23}+8y=12$

$\frac{72}{23}+8y=12$

$8y=12-\frac{72}{23}$

$8y=\frac{276}{23} -\frac{72}{23}$

$8y=\frac{204}{23}$

$y=\frac{204}{23}   . \frac{1}{8}$

$y=\frac{204}{184}=\frac{102}{92}=\frac{51}{46}$