2. resolva as equações:
a) 4 × - 1 = 3 (× - 1)
b) 3 (× - 2) = 2 × - 4
c) 2 (× - 1) = 3 × + 4
d) 3 (× - 1) - 7 = 15
e) 7 (× - 4) = 2 × - 3
f) 3 (× - 2) = 4 (3 - ×)
g) 3 (3 × - 1) = 2 (3 × + 2)
h) 7 ( × - 2) = 5 (× + 3)
i) 3 (2 × - 1) = - 2 (× + 3)
j) 5 × - 3 (× + 2) = 15
k) 2 × + 3 × + 9 = 8 (6 - ×)
a) 4 × - 1 = 3 (× - 1)
b) 3 (× - 2) = 2 × - 4
c) 2 (× - 1) = 3 × + 4
d) 3 (× - 1) - 7 = 15
e) 7 (× - 4) = 2 × - 3
f) 3 (× - 2) = 4 (3 - ×)
g) 3 (3 × - 1) = 2 (3 × + 2)
h) 7 ( × - 2) = 5 (× + 3)
i) 3 (2 × - 1) = - 2 (× + 3)
j) 5 × - 3 (× + 2) = 15
k) 2 × + 3 × + 9 = 8 (6 - ×)
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a) 4x-1 = 3x - 3
x = -2
b) 3x - 6 = 2x - 4
x = 2
c) 2x - 2 = 3x + 4
-x = 6
x = -6
d) 3x - 3 - 7 = 15
3x = 25
x = 25/3
x = 8,33...
e) 7x - 28 = 2x - 3
5x = 25
x = 25/5
x = 5
f) 3x - 6 = 12 - x
4x = 18
x = 18/4
x = 4,5
g) 9x - 3 = 6x + 4
3x = 7
x = 7/3
x = 2,33...
h) 7x - 14 = 5x + 15
2x = 29
x = 29/2
x = 14,5
i) 6x - 3 = - 2x - 6
8x = -3
x = -3/8
x = - 0,375
j) 5x - 3x - 6 = 15
2x = 21
x = 10,5
k) 2x + 3x + 9 = 48 - 8x
13x = 39
x = 39/13
x = 3