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What is the solution to this system of linear equations: y-x=4 and y+2x=1

1) (-1,3)
2) (0,4)
3) (1,-1)
4) (-3,3)

Sagot :

HunterXid
y-x=4
y+2x=1

3x=-3
x=-1

substitute to any equation
y-x=4
y+1=4
y=3

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