Question

Resolva as equações.

A) 18x-43=65 B) 23x-16=14-17x

C) 2x+6=x+18 D) 5x-3=2x+9

E) 3x-5=13 F) 3x+5=2

Answer 1

A)
18x - 43 = 65
18x = 65 + 43
18x = 108
x = 108/18
x = 6

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B)
23x - 16 = 14 - 17x
23x + 17x = 14 + 16
40x = 30
x =  30  (:10)
      -------
        40  (:10)

x = 3/4

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C)
2x + 6 = x + 18
2x - x = 18 - 6
x = 12

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D)
5x - 3 = 2x + 9
5x - 2x = 9 + 3
3x = 12
x = 12/3
x = 4

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E)
3x - 5 = 13
3x = 13 + 5
3x = 18
x = 18/3
x = 6

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

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