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sweet-ann [11.9K]
3 years ago
15

If 3x +y=12 find x when y=-15

Mathematics
1 answer:
maw [93]3 years ago
8 0

Answer:

x=9

Step-by-step explanation:

3x+y=12

3x+(-15)=12

3x=27

3/3= 27/3

x=9

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