Question

-4x-10y=-7
4x+5y=5 metodo igualacion

Answer 1

-4x -10y = -7 (1)
4x +5y  = 5 (2)

de (1) y (2) despejamos x
-4x -10y = -7
-10y +7 = 4x
( -10y + 7)/4 = x (3)

4x + 5y = 5
4x = 5 - 5y
x = (5 -5y)/4 (4)

igualamos (3) Y (4)

 (-10y +7)/4 = (5 -5y)/4  simplificamos el 4
-10y +7 = 5 -5y
-10y +5y = 5-7
- 5y = -2
y = -2/-5
y =2/5
remplazamos este valor en (4)
x = (5 -5y)/4
x =[ 5 - 5(2/5)]/4
x = (5 -2)/4
x = 3/4

Solucion
x= 3/4 ,  y= 2/5