While solving a pair of linear equations in two variables by the elimination method, in which situation can one variable be eliminated directly?
Answer and explanation
Correct answer: जब किसी एक चर के गुणांक बराबर परन्तु विपरीत चिह्न वाले हों
In elimination, adding equations cancels coefficients with equal magnitude and opposite signs, such as \(3x\) and \(-3x\), since their sum is \(0\). Equal constants alone do not eliminate a variable. Exam tip: first align one variable’s coefficients.
Frequently asked questions
What is the correct answer to this question?
जब किसी एक चर के गुणांक बराबर परन्तु विपरीत चिह्न वाले हों
Why is this the correct answer?
In elimination, adding equations cancels coefficients with equal magnitude and opposite signs, such as \(3x\) and \(-3x\), since their sum is \(0\). Equal constants alone do not eliminate a variable. Exam tip: first align one variable’s coefficients.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Pair of Linear Equations in Two Variables. Topic: Algebraic methods: Substitution method and Elimination method..
