Solve the linear system equations using substitution and elimination and graph? 4x-y=5     4x+4y=-4     

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Solve the system of equations:

`4x-y=5 .....(1)`

`4x+4y=-4` .....(2)

To solve by substitution, rewrite (1) to determine the value of y in terms of x.


Substitute (3) for y in (2).





Substitute x=0.8 in (3)


Thus x=0.8 and y=-1.8

To solve by elimination, subtract (2) from (1).



` ` ------------------




Replace y in (1) and solve for x.




Thus x=0.8 and y=-1.8

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