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How do you solve $3 | - 8 x | + 8 = 80$ $3abs(-8x)+8=80$ ?

1 Answer

Mar 14, 2017

$x = - 3 XXX or XXX x = + 3$ $x=-3color(white)("XXX")orcolor(white)("XXX")x=+3$

Explanation:

If $3 | - 8 x | + 8 = 80$ $3abs(-8x)+8=80$

$\to 3 | - 8 x | = 72$ $rarr 3abs(-8x)=72$

$\to | - 8 x | = 24$ $rarr abs(-8x)=24$

$\to 8 \cdot | - x | = 24$ $rarr 8 * abs(-x) = 24$

$\to | - x | = 3$ $rarr abs(-x)=3$

$\to x = \pm 3$ $rarr x=+-3$

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