Solve :
3(5x + 7) + 5(2x - 11) = 3(8x - 5) - 15

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Solution

$3 (5 x + 7) + 5 (2 x - 11) = 3 (8 x - 5) - 15$
$15 x + 21 + 10 x - 55 = 24 x - 15 - 15 =$ $25 x - 34 = 24 x - 30$
$25 x - 24 x = - 30 + 34$
$x = 4$

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Solve the following equation:
$5 (2 x - 3) - 3 (3 x - 7) = 5$

{(\frac{5}{3})}^{- 5} \times {(\frac{5}{3})}^{- 11} = {(\frac{5}{3})}^{8 x}

x = ?

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