• Determine o valor de X nas equações:
A. 3 (x-2) = -6
B. -3 (x-2) = 9
C. -4 (-x-2) = 16
D. 4 (3x+5) = 0
E. -4 (x+2) = -9
F. -5 (4x-2) = 0
A. 3 (x-2) = -6
B. -3 (x-2) = 9
C. -4 (-x-2) = 16
D. 4 (3x+5) = 0
E. -4 (x+2) = -9
F. -5 (4x-2) = 0
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A= 3x-6 = -6
3x= -6 +6
3x = 0
X= 0
B. -3(x-2)=9
-3x +6= 9
-3x = 9-6
-3x= 3
x=3/-3
X= -1
C. -4(-x-2) = 16
4x + 8 = 16
4x =16-8
4x = 8
X = 8/4
X= 2
D. 4 (3x+5) = 0
12x + 20 = 0
12x = -20
X= -20/12
X = -1,666...
E. -4 (x+2) = -9
-4x - 8 = 9
-4x = 9 + 8
-4x = 17
X = 17/ -4
X= -4.25