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A linear equation is said to be in standard form when it is written in what form?
Ay=Ax+B
BAx-By=C
CAx+By=C
Dx+y=AB
Answer & Solution
Correct answer: C. Ax+By=C
1. The definition states directly that a linear equation is in standard form when written as Ax + By = C.
2. The slope-intercept style y = Ax + B rearranges the same idea but is not called standard form.
3. Flipping the sign to Ax - By = C or rearranging into x + y = AB does not match the definition given.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 4 "Graphs", section 4.1 Use the Rectangular Coordinate System_
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