Question

métodos de sustitución
5x-5y=8
x-y=7
​

Answer 1

Respuesta:

5×=8+5y

x=8+5y/5 x=8+5(27)/5

x= 8 + 135/5

x =8+ 27

x = 35

x-y=7

8+5y/5-y=7

8+5y-5y =35

y = 27

Answer 2

5x-5y=8
5x=8+5y


X-y=7
8+5y-y=7
4y=-1
Y=-1/4

5x=8+5y
5x=8+5.(-1/4)
5x=27/4
X=27/4 : 5
X=27/20