Question

4x+5y=8
-10y-4x=-7 sustitución

Answer 1

Respuesta:

Explicación paso a paso:

4x+5y=8

-10y-4x=-7

4x=8-5y

x=(8-5y/4)

-10y-4(8-5y/4)=-7

-10y-32/4+20y/4=-7

-10y-8+5y=-7

-5y=1

y=-1/5

4x=8-5(-1/5)

4x=8+1

4x=9

x=9/4