2x - y=3:9x-3y=9 by solving substitution method
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Answer:
x =0. y=-3
Step-by-step explanation:
2x-y=3
y=2x-3
9x-3y=9
9x-3(2x-3) =9
9x-6x+9=9
3x=0
x=o
y=2(0)-3
y=-3
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