Resposta :

a) 3x + 1/2 = 2x + 7/2 (mmc de 1 e 2=2)
(6x +1 = 4x +7)/2
6x +1 = 4x +7
6x -4x = 7-1
2x= 6
x= 6/2
x=3

b) 2x/3 + 1 = x/2 + 5/3 (mmc de 3 e 2= 6)
(4x +6 = 3x +10)/6
4x +6 = 3x +10
4x -3x = 10-6
x= 4


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