Answer :

3x-12+57=90 
3x+45 =90
    -45  -45 
  3x= 45
  x=15

<MNQ= 33 because 90-57=33

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raykhona21

Answer:

3x-12+57=90

3x+45 =90

-45 -45

3x= 45

x=15

X equals to 15

<MNQ= 33 because 90-57=33

Step-by-step explanation:

I hope I can help you :)

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