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the sum of three numbers is 6. the third number is the sum of the first and second numbers. the second number is 7 more than the first number. find the three numbers

Respuesta :

Answer:

-2, 5, 3

Step-by-step explanation:

A + B + C = 6

C = A + B

A + 7 = B

Now replace each of the letters with what we know

A + (A + 7) + (A + (A + 7)) = 6

Combine like terms

4A + 14 = 6

4A = -8

A = -2

A + 7 = B, so B = 5

C = A + B, so C = 3

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