a)x+2.1=5.6
x=5.6-2.1
x=3.5
b)3.7+x=11.7
x=11.7-3.7
x=8
c)x-7.2=9.18
x=9.18+7.2
x=16.38
d)8-x=3.723
x=8-3.723
x=4.277
e)4.3+x+3.42=7.8
7.72+x=7.8
x=7.8-7.72
x=0.08
f)x-(25.7-3.41)=7.71
x-22.29=7.71
x=7.71+22.29
x=30
g)x*4.5=9
x=9:4.5
x=2
h)10.3*x=573.71
x=573.71:10.3
x=55.7
i)7*x=84.07
x=84.07:7
x=12.01
j)x:2.9=3.5
x=3.5*2.9
x=10.15
k)20:x=6.4
x=20:6.4
x=3.125
l)x:1.2=4
x=4*1.2
x=4.8
am flolosit . in loc de ,
