resolva as expressões
a) 4x - 3 - x + 8
b) 6. (x - 2) = 12
c) 9 + 2 . (5x - 4) = 21
d) 10x + 4 . (3 - 2x) - 6 = 8
e) 3 . (5 + 3x) + 5 . ( -x - 1) = 22
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A ) 3x + 5
B ) 6x - 12 = 12
6x = 24
x = 4
C ) 9 + 10x - 8 = 21
10x + 1 = 21
10x = 20
x = 2
D ) 10x + 12 - 8x - 6 = 8
2x + 6 = 8
2x = 2
x = 1
E ) 15 + 9x - 5x - 5 = 22
4x + 10 = 22
4x = 12
x = 3
B ) 6x - 12 = 12
6x = 24
x = 4
C ) 9 + 10x - 8 = 21
10x + 1 = 21
10x = 20
x = 2
D ) 10x + 12 - 8x - 6 = 8
2x + 6 = 8
2x = 2
x = 1
E ) 15 + 9x - 5x - 5 = 22
4x + 10 = 22
4x = 12
x = 3
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