Solve the following system of equation using the graphing method.

Y = negative X
Y = X + 9

Don't know what to do. Thank u if u can helpme.

1 answer

-x = x + 9
2 x = -9
x = -9/2
y = 9/2

two points on first line
(0, 0 ) and (1,-1)

two points on second line
(0,9) and ( 2 , 11)

draw the two lines and see where they cross (One has 45 deg slope, the other -45 deg slope)
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