Question

Resolva As Equações :
A)2x - 4= 3 - 6x
B) 3x - 5 = 2x + 7
C) 3x + 7 = 2x + 8
D) 3x - 8 = 16 - 5x
E) 4x + 13 = -6x+ 9
F) 12x - 9 = 3x - 12

Answer 1

A)2x - 4= 3 - 6x ==> 2x+6x = 3 +4 ==. 8x = 7 ==> x = 7/8
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B) 3x - 5 = 2x + 7 ==>  3x -2x  = 5 + 7 ==> x = 12
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C) 3x + 7 = 2x + 8 ==>  3x -2x  = 8 - 7 ==> x = 1
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D) 3x - 8 = 16 - 5x  ==> 3x + 5x  = 16 + 8 ==> 8x = 24 ==> x = 3
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E) 4x + 13 = -6x+ 9  ==>  4x +6x  = 13 + 9 ==>10x = 22 ==> x = 22/10
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F) 12x - 9 = 3x - 12 ==>  12x -3x  = 9 - 12 

9x = -3 ==> x = - 3/9 ou x= -1/3