Question

3x+5y=190
4x+7y=260
me ayudan plis con comprobacion

Answer 1

Respuesta:

y=5190−3x=7260−4x

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

1330-21x=1300-20x1330−21x=1300−20x

20x-21x=1300-133020x−21x=1300−1330

-x=-30−x=−30

x=30x=30

y=\frac{190-3x}{5}=\frac{190-3(30)}{5}y=5190−3x=5190−3(30)

y=20y=20