One number is 12 more than 3 times another number. The sum of the 2 numbers is −20. What are the numbers?

−8 and −12

Explanation

x = one number and 3x + 12 = the other number, for the equation:
x + 3x +12 = − 20
4x +12 = −20
4x = −32
x = −8
3(−8) + 12 = −12

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