Equation 1: Ax+By=C equation 2: Dx+Ey=F which of the following could replace equation 1 and still have the same solution? Select all that apply.
A. A multiple of the equation 1.
B. The sum of Equation 1 and Equation 2.
C. An equation that replaces only the coefficient of x with the sum of the coefficient of x in equation 1 and equation 2.
D. The sum of a multiple of Equation 1 and Equation 2.
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