Question : What is the value of $x$ for which the expressions $8x+12$ and $14x-6$ become equal?
Option 1: 1
Option 2: 3
Option 3: 6
Option 4: 9
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Correct Answer: 3
Solution : Given: The equations are $8x+12$ and $14x-6$. According to the question, $8x+12 = 14x-6$ $⇒12+6 = 14x-8x$ $⇒6x = 18$ $\therefore x = 3$ Hence, the correct answer is 3.
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Question : If $x^{2}+\frac{1}{x^{2}}=1$, then, what is the value of $x^{48}+x^{42}+x^{36}+x^{30}+x^{24}+x^{18}+x^{12}+x^{6}+1$?
Option 1: – 9
Option 2: 0
Option 3: 1
Question : If ${x^2+y^2+z^2=2(x+z-1)}$, then the value of $x^3+y^3+z^3$ is equal to:
Option 1: 6
Option 2: 1
Option 3: 2
Option 4: 8
Question : Which of the following expressions is equal to the expression $\frac{x^2-3 x+2}{x^2-4}$?
Option 1: $\frac{x+1}{x-2}$
Option 2: $\frac{x-1}{x+2}$
Option 3: $\frac{x+1}{x+2}$
Option 4: $\frac{x-1}{x-2}$
Question : If $x^2+\frac{1}{x^2}=7$, then what is the value of $x^3+\frac{1}{x^3}$?
Option 1: 9
Option 2: 18
Option 3: 27
Option 4: 36
Question : If $x+\frac{1}{x}=\sqrt{3}$ then, the value of $x^{30}+x^{24}+x^{18}+x^{12}+x^{6}+1$ is:
Option 1: $\sqrt{3}$
Option 2: $-\sqrt{3}$
Option 3: $1$
Option 4: $0$
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