Question 2

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Jambmaths question: 

If 55x +52x =7710, find x

Jamb Maths Solution: 

$\begin{align}  & 5\times {{x}^{1}}+5+5\times x+2=77 \\ & 5x+5+5x+2=77 \\ & 10x+7=77 \\ & 10x=70 \\ & x=7 \\\end{align}$

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