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Instructions for a craft project say that the length of a piece of red ribbon should be 7 inches less than the length of a piece of blue ribbon. How long is the BLUE ribbon if the length of the RED ribbon is 12 inches?

Respuesta :

debmc7
r = red, b=blue

r = b-7
12= b-7, add 7 to both sides
19= b

Checking answer, if blue is 19 inches, 7 inches less than that is 12, which is the length of the red.
The blue ribbon is 19 inches long

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