An equation of the form ax + by + c = 0, with a and b not both zero, is a linear equation in:
ATwo variables
BOne variable
CThree variables
DFour variables
Answer & Solution
Correct answer: A. Two variables
1. Here a, b and c are real numbers.
2. Both x and y appear.
3. So it is a linear equation in two variables.
_Source: NCERT Class 10 Mathematics, Chapter 3, Pair of Linear Equations in Two Variables._
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