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Mathematics 7 Online
OpenStudy (hijacktrolo):

A set of equations is given below: Equation A: c = 2d + 1 Equation B: c = 3d + 5 Which of the following is a step that can be used to find the solution to the set of equations? 2d + 1 = 3d + 5 2d = 3d + 5 2d + 1 = 3d 2d + 5 = 3d + 1 plz help

OpenStudy (nitroster):

The answer is the first one... "2d + 1 = 3d + 5" because they plugged in equation A for equation B to find d. Once finding d, they can put in d for Equation A to find C.

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