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riadik2000 [5.3K]

3 years ago

13

Use substitution 9x-3y=9 3x-y=3

1 answer:

zhannawk [14.2K]3 years ago

5 0

Answer:

x=1

Step-by-step explanation:

3x-y=3

y=3-3x

9x-3y=9

9x-3(3-3x)=9

9x - 9 + 9x=9

9x + 9x=9 + 9

18x=18

x=18÷18

x=1

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Step-by-step explanation:

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