mariumkhan181
mariumkhan181 mariumkhan181
  • 11-03-2021
  • Mathematics
contestada

3x+2y=30
3x-y=21
What’s the answer!

Respuesta :

mumsy
mumsy mumsy
  • 11-03-2021

Answer:

Step-by-step explanation:

3x+2y=30

i will multiply the second equation by -1

-3x+y=-21

3x+2y=30

3y=9

y=3

replace y in the first equation

3x+6=30

3x=30-6

3x=24

x=8

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