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#)