1,|x−3,5|−3.5=4 |x−3,5|−3,5=45 |x−3,5|=75
TH1: x−3,5=75
TH2: x−3,5=−75 x=4,9 x=2,1
Vậy x∈{4,9;2,1}2,37x−12=521:53 37x−12=17 37x=914 x=323,14+13:(2x)=−5 13:(2x)=−194 2x=−574 X=−5785,x15=−83⇔x.3=15.(−8)
⇔x.3=−120⇔x=−406,
x+56−45=25x+56=65TH1: x+56=65 TH2: x+56=−65 x=1130 x=−6130