+677 Hello Guest,
here are my steps:
rewrite the system of equations to:
\(4x+5y=7\)
\(13x+5y=7\) ,
\(4x+5y=7\)
\(-13x+5y=-7\),
\(-9x=0\),
\(x=0\),
\(4*0+5y=7\),
\(y=\frac{7}{5}\),
\((x,y)=(0,\frac{7}{5})\),
\(4*0+5*\frac{7}{5}=13*0+5*\frac{7}{5}=7\),
so \(7=7=7\) (it's true), finally is the solution:
\((x,y)=(0,\frac{7}{5})\)
Straight
