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-2x=2/:(-2)
x=-1
b) 9x-8x+1=2
x+1=2
x=2-1
x=1
c) 2x+5-3x=0
-x+5=0
-x=-5
x=5
d) 42+5x-2x=12
3x+42=12
3x=-30/:3
x=-10
e) y-2+y=6
2y-2=6
2y=8/:2
y=4
f)1/2z( jedna druga) +4-z=-1
1/4+4-z=-1
4 i 1/4-z=-1
-z=-1+4 i 1/4
-z=3 i 1/4
z=-3 i 1/4
7x - 9x = 2
-2x = 2 | (-2)
x = -1
b)
9x - 8x + 1 = 2
x = 2 - 1
x = 1
c)
2x + 5 - 3x = 0
-x = -5 | (-1)
x = 5
d)
42 + 5x - 2x = 12
3x = 12 - 42
3x = -30 | 3
x = -10
e)
y - 2 + y = 6
2y = 8 | 2
y = 4
f)
1/2z + 4 - z = -1 | razy 2
z + 8 - 2z = -2
-z = 6 | :(-1)
z = -6