How do you solve #-3(x+3)>7.5#?

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Answer 1 · 2016-04-09T14:08:05

#=>x< -1/2#

Straight away let’s get rid of the decimal.

Multiply both sides by 10

#-30(x+3)>75#

Divide both sides by 30

#-(x+3)>75/30#

Multiply both sides by (-1) . Note that this turns the inequality round the other way

#+(x+3)<75/30#

Subtract 3 from both sides

#x<75/30-3#

#=>x< -1/2#