Question

2•x=1,(3)
X=?
x:3=2,1(4)
X=?
2,3(51)+x=4
X=?
2,31•x=4,5
X=?

Answer 1

2x=1,(3)
2x=13-1/9
2x=12/9
x=12/9:2
x= 6/9
x=2/3


3:x=2,1(4)
3:x= 214-21/90
3:x=193/90
x=193/90 ori 3
x=193/30


2,31x=4,5
x=4,5/2,31
x=45/10:231/100
x=45/10 ori 100/231
x= 450/231

2,3(51)+x=4
2351-23/990+x=4
2328/990+x=4
x=4-2328/990
x= 4 ori 990- 2328/990
x= 3960/990-2328/990
x= 1732/990