+118723 3.5(x-8/4)=2.8
simplify 8/4=2
3.5(x-2)=2.8
now divide both sides by 3.5
\(\frac{3.5(x-2)}{3.5}=\frac{2.8}{3.5}\\ x-2=\frac{2.8}{3.5}\\ \mbox{Now plus 2 to both sides}\\ x-2+2=\frac{2.8}{3.5}+2\\ x=\frac{2.8}{3.5}+2\\\)
Now finish it with a calculator. Remember that a fraction line is divide. :)
2.8/3.5+2 = 2.8
