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2a-a=1+3
a=4
b)5d+2=3d
5d-3d=-2
2d=-2
d=-1
c)4b+3=3b-4
4b-3b=-4-3
b=-7
d)6e-2=7e+5
6e-7e=5+2
e=7
e)7+3c=-5=2c
3c-2c=-5-7
c=-12
f)6f-1=f+2
6f-f=2+1
5f=3 |:5
f=⅗
prosz... ;]]
2a = a+4 /-a
a = 4
b) 5d+2=3d /-3d
2d+2 = 0 /-2
2d = -2 /:2
d = -1
c) 4b+3 = 3b-4 /+4
4b+7 = 3b /-4b
7 = -b /:(-1)
-7 = b
d) 6e -2 = 7e+5 /+2
6e = 7e+7 /-7e
-e = 7 /:(-1)
e = -7
e) 7 +3c = -5+2c /-2c
7 + c = -5 /-7
c = -12
f) 6f-1 = f+2 /+1
6f = f+3 /-f
5f = 3 /:5
f = 3/5
f = 0,6
2a=a+4/-a
a=4
b)5d+2=3d/-3d
2d+2=0/-2
2d=-2
d=-1
c)4b+3=3b-4//+4
4b+7=3b/-4b
7=-b
b=-7
d)6e-2=7e+5/-7e
-e-2=5/+2
-e=7
e=-7
e)
chyba zle jest napisane
f)6f-1=f+2/-f
5f-1=2/+1
5f=3/:5
f=trzy piate =0,6