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Which of the following is true ? A) 3x = 10, x = 1B) 2m = 1, m = 0 C) 2/3x2 = 1, x = 3/2 D) 2x – x = 9, x = 9 |
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Answer» D) 2x – x = 9, x = 9 Correct option is (D) 2x – x = 9, x = 9 (A) 3x = 10 \(\Rightarrow\) x = \(\frac{10}3.\) Thus, (A) is false. (B) 2m = 1 \(\Rightarrow\) m = \(\frac12.\) Thus, (B) is false. (C) \(\frac{2}{3}x^2=1\) \(\Rightarrow\) \(x^2=\frac1{\frac23}=\frac{3}{2}\) \(\Rightarrow\) \(x=\pm\sqrt{\frac32}.\) (D) 2x – x = 9 \(\Rightarrow\) x = 9. |
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