Final answer:
The equivalent expression for 3x−12y+223y−56x is −53x + 211y, which does not match any of the provided answer choices, indicating a potential error in the question or answers.
Step-by-step explanation:
The student has asked to find an equivalent expression for 3x−12y+223y−56x. The first step is to combine like terms. The like terms in the expression are the coefficients of x and the coefficients of y, which can be combined by addition or subtraction, respectively.
Combining terms for 'x' gives: 3x − 56x, which simplifies to −53x.
Combining terms for 'y' gives: −12y + 223y, which simplifies to 211y.
Combining the simplified terms for 'x' and 'y' gives us the final expression: −53x + 211y. However, none of the provided options match this result, which implies there might be an error either in the given expression or in the multiple-choice answers. Therefore, none of the options A through D are correct based on the given expression.