Question

Método de sustitución 5x-y=-3 -2x+y=0

Answer 1

5x-y=-3
-2x+y=0

-2x+y=0
-2x=0-y
x=2+y

5x-y=-3
5(2+y)-y=-3
10+5y-y=-3
5y-y=-3-10
4y=-13
y=$\frac{-13}{4}$

-2x+y=0
-2x+($\frac{-13}{4}$)=0
-2x-$\frac{-13}{4}$=0
-2x=0+$\frac{13}{4}$
-2x=$\frac{13}{4}$
x=$\frac{ \frac{13}{4} }{ \frac{2}{1}}$
x=$\frac{13}{8}$

x=$\frac{13}{8}$  y=$\frac{-13}{4}$