For linear equations 8x+2y=60 and 9x+3y=69, what is the value of x?
Linear equations 8x+2y=60 और 9x+3y=69 का solution x क्या है?
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Correct Answer
C. 7
ExplanationStep 1: solve the pair of linear equations. Step 2: by substitution or Cramer's rule, x=7 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=7 और y=2 मिलता है। Step 3: exam tip: determinant non-zero हो तो unique solution होता है।