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Solving Inequalities

If 50=3x-4,...

Question

If $50 = (3 x - 4)$ , what is the value of $x$ ?

4

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10

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18

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20

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Solution

The correct option is D $18$
Consider $50 = 3 x - 4$ and solve as shown below:
Add $4$ on both sides
$\Rightarrow 50 + 4 = 3 x - 4 + 4$
$\Rightarrow 54 = 3 x$
Divide by $3$ on both sides
$\Rightarrow \frac{54}{3} = \frac{3 x}{3}$
$\Rightarrow x = 18$
Hence, option $C$ is correct.

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