Question

x + 1 + 7 = 3 x
$x + 1 + 7 = 3 \times$
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Answer 1

x+1+7=3x

x+8=3x

x+8-8=3x-8

x=3x-8

x-3x=3x-8-3x

-2x=-8

$\frac{-2x}{-2}=\frac{-8}{-2}$

x=4