How do you solve $3.5(x-8/4) = 2.8$ ?

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Answer 1 · 2016-02-19T12:31:02

$x=14/5$

Simplify 8/4 to 2.

$3.5(x-2)=2.8$

Divide both sides by 3.5

$x-2=0.8$

Add 2 to both sides.

$x=2.8=14/5$

Answer 2 · 2016-02-19T12:34:32

$x=2 4/5$

First do the easy bit and replace $8/4$ with $2$

$color(white)("XXX")3.5(x-2)=2.8$

Divide both sides by $3.5$
(this is easier if you notice $3.5=7xx0.5$ and $2.8=7xx0.4$ )
$color(white)("XXX")(x-2)= 4/5$

Add $2$ to both sides:
$color(white)("XXX")x= 2 4/5$ (or $14/5$ )

How do you solve 3.5(x-8/4) = 2.83.5(x-8/4) = 2.8?