Question

resolva as equações:
a)5x/2+7=2x+4
b)x/2+x/3=x+7/3
c)3x-2/4=3x+3/8
d)3x+5/4-2x-3/3=3

Answer 1

a)5x/2+7=2x+4
5x/2 - 2x = 4 - 7
5x/2 - 4x/2 = -6/2
5x - 4x = - 6
x = - 6
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b)x/2+x/3=x+7/3
3x/6 + 2x/6 = 6x/6 + 14/6
3x + 2x = 6x + 14
5x - 6x = 14
-x = 14 (-1)
x = - 15
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c)3x-2/4=3x+3/8
24x/8 - 4/8 = 24x/8 + 3/8
24x - 4 =24x + 3
24x - 24x = 3 + 4
0 
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d)3x+5/4-2x-3/3=3
36x/12 + 15/12 - 24x/12 - 36/12 = 36/12
36x + 15 - 24x - 36 = 36
36x - 24x = 36 + 36 - 15
12x = 57
x = 57/12