Question

Me ajudem,por favor!
a)34+25÷5+1-4x=-9x+3
b)1x/2+3-5=-2x
c)5(x+x/5)-3=-x/5
d)35-2/3x+1=2x+14
e)1x/4-1x/2+7=3x/4-5

Answer 1

a)34+25÷5+1-4x=-9x+3

34 + 5 + 1 - 4x = - 9x + 3

40 - 4x = - 9x + 3

-4x + 9x = 3 - 40

5x = - 37 --> x = -37/5

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b)1x/2+3-5=-2x

x/2 - 2 = - 2x

x/2 + 2x = 2 ¨¨¨¨¨¨¨¨mmc=2

x + 4x = 4

5x = 4 --> x = 4/5

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c)5(x+x/5)-3=-x/5

5x + 5x/5 - 3 = - x/5

5x + x + x/5 = 3

6x + x/5 = 3 ¨¨¨¨¨¨¨¨mmc=5

30x + x = 15

31x = 15 ---> x = 15/31

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d)35-2/3x+1=2x+14

35 + 1 - 14 = 2x + 2x/3

22 = 2x + 2x/3 ¨¨¨¨¨¨¨¨¨mmc=3

66 = 6x + 2x

66 = 8x ---> x = 66/8 = 33/4

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e) 1x/4-1x/2+7=3x/4-5

x/4 - x/2 - 3x/4 = - 12 ¨¨¨¨¨¨¨¨¨mmc=4

x - 2x - 3x = - 48

-4x = - 48

4x = 48 ---> x = 48/4 ---> x = 12