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Elimination method and substitution methods

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Elimination method
1) 5r-6s=-10
6r+5s=49

2) 1/3x + 1/1y=2/3
2/3x + 3/5y=1/5

3) 5x+3y=-12
6x-3y=-54

4) p=47+q
8p=6q+404

Substitution method

1) x+y=5
y=x-3

2) r-45=0
6r-5s=133

3) 6x+3y=-36
-7x+y=60

System of equation by graphing:

1) y-2x=0
y=4x-1

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