Question

3x+5y=190
4x+7y=260
por el método de igualación

Answer 1

$y=\frac{190-3x}{5}=\frac{260-4x}{7}$

$y=7(190-3x)=5(260-4x)$

$1330-21x=1300-20x$

$20x-21x=1300-1330$

$-x=-30$

$x=30$

$y=\frac{190-3x}{5}=\frac{190-3(30)}{5}$

$y=20$