Solve the system of equations. 5x - 7y = 58
y = -x + 2
x=
y=
please help me out and if you can please explain how to do it. :)​

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Can someone explain to me how to do

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n