Hard Math Class 12 Level 2

For linear equations 4x+2y=16 and 5x+3y=21, what is the value of x?

Linear equations 4x+2y=16 और 5x+3y=21 का solution x क्या है?

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Correct Answer

C. 3

Explanation

Step 1: solve the pair of linear equations. Step 2: by substitution or Cramer's rule, x=3 and y=2. Step 3: exam tip: non-zero determinant gives a unique solution.

Step 1: pair of linear equations solve करें। Step 2: substitution/Cramer's rule से x=3 और y=2 मिलता है। Step 3: exam tip: determinant non-zero हो तो unique solution होता है।

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