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a) 12 + 2x = 3
b) -6 - x = 0
c) -6x - 2 = 16
d) 2x + 4,5 = 8,5 + x
e) 6y + 8 = 128
f) 9x = x - 32
g) x - 1 = 3 - x
h) x + 3 = 12 - x
i) 2(2x + 1) = 8
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a) 2x = 3-12
2x = -9
x = -4,5
b) -6 - x = 0
-x = 6
x = -6
c) -6x - 2 = 16
-6x = 18
x = -3
d) 2x + 4,5 = 8,5 + x
2x = 8,5 - 4,5 + x
x = 4
e) 6y+8=128
6y = 128 - 8
6y= 120
y = 20
f) 9x = x-32
8x = -32
x = -4
g) x-1 = 3-x
x = 3-x + 1
2x = 2
x = 1
h) x+3 = 12 -x
x = 12 - x - 3
2x = 9
x = 4,5
j) 2(2x+1) = 8
4x + 2 = 8
4x = 8-2
4x = 6
x = 4/6
x =2/3
a)12 + 2x = 3
2x=3-12
2x=-9:2
x=-4,5
b) -6 - x = 0
-x=6*(-1)
x=-6
c) -6x - 2 = 16
-6x=16+2
-6x=18:(-6)
x=-3
d) 2x + 4,5 = 8,5 + x
2x-x=8,5-4,5
x=4
e) 6y + 8 = 128
6y=128-8
6y=120:6
y=20
f) 9x = x - 32
9x-x=-32
8x=-32:8
x=-4
g) x - 1 = 3 - x
x+x=3+1
2x=4:2
x=2
h) x + 3 = 12 - x
x+x=12-3
2x=9:2
x=4,5
i) 2(2x + 1) = 8
4x+2=8
4x=8-2
4x=6:4
x=1,5
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