$\begin{matrix} If (x + 1) + (x + 4) + (x + 7) + (x + 28) = 155 . Find x . \end{matrix}$

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Solution

Given, $(x + 1) + (x + 4) + (x + 7) + (x + 28) = 155$
$x + 1 + x + x + 4 + 7 + x + 28 = 155$
$4 x + 40 = 155$
$4 x = 115$
$x = \frac{115}{4} = 28.75$

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