a)X+2=6=>X=6-2=>x=4
b2,5+X=4.35 x=4,35-2,5 x=1,85
c7-x=4.35 x=4.35-7 x= -2,65
d x-4,32=2,8 x=2,8+4,32 x=7,12
e x+14,35 =37,2 x=37,2-14.35 x=22,85
f 21,05+x=40,85 x=40,85-21,05 x=19,85
g x=14/2 x=7
h x=15,45/3 x=5,15
i x=25,32/10 x=2,532
k x=29,21x4 x=116,84
j x=4,29x10 x=42,9
l x=32x0,08 x=0,256