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How do you solve $7.8 x - 1 = 63$ $7.8x - 1 = 63$ ?

1 Answer

Jul 8, 2015

$x = 8.205128$ $x= 8.205128$ (approximate)

Explanation:

If $7.8 x - 1 = 63$ $7.8x - 1 = 63$
then
$XXXX$ $color(white)("XXXX")$ $7.8 x = 64$ $7.8x = 64$
and
$XXXX$ $color(white)("XXXX")$ $x = \frac{640}{78}$ $x = 640/78$

which can be solved by hand (if necessary) or by using a calculator to get the answer above.

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