x + 3 y = 5∣ ⋅ 4 4 x + □ y = □ 4 x + 12 y = 20 4 x + 12 y = 20
The missing values in the second equation that make it coincident with the first equation are 12 for the coefficient of y and 20 for the constant. Therefore, the completed equation is 4x + 12y = 20.
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