a) x=17×4/34=2
b) x=(15×6)/(8×5)=3×3/4=9/4
c) 3x+1=4×5/2=>3x+1=10=> 3x=9 => x=3
d) x+2=18×3/6 => x+2=9 => x=7
e) x-3= 7×5/4 => x-3=35/4=> x=35/4 + 12/4 => x=47/4