Răspuns :
Solutie pentru b.
a) 2x-7=0
2x=7
x=7/2
b)7x+3=5
7x=2
x=2/7
c)7x+2=8
7x=6
x=6/7
d)9x-3=2x
7x=3
x=3/7
a) 2x-7=0
2x=7
x=7/2
b)7x+3=5
7x=2
x=2/7
c)7x+2=8
7x=6
x=6/7
d)9x-3=2x
7x=3
x=3/7