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WAEC Mathematics 2018 Paper

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Question : 7

Total: 50

If

\log_{10}

\log_{10}

2 = 1, solve for x.

2
3
4
5

Solution:

$\log_{10}$ (6x - 4) - $\log_{10}$ 2 = 1

$\log_{10}$ (6x - 4) - $\log_{10}$ 2 = $\log_{10}$ 10

$\log_{10}$ $\frac{6x - 4}{2}$ - $\log_{10}$ 10

$\frac{6x - 4}{2}$ = 10

6x - 4 = 2 x 10

= 20

6x = 20 + 4

6x = 20

x = $\frac{24}{6}$

x = 4

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