Question

Resolva as seguintes equação do 1grau sendo u+r. f)8x+5=6x+4 g)2x+2=20 h)3x-1-2x=13 i)x-1=10 j)2x-3=3x+1 k)4x-5=3x+1

Answer 1

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f)

8x + 5 = 6x + 4
8x - 6x = 4 - 5
2x = - 1
x = - 1/2

R.: Sendo U = R, x = - 1/2

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g)
2x + 2 = 20
2x = 20 - 2
2x = 18
x = 18/2
x = 9

R.: Sendo U = R, x = 9.

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h)
3x - 1 - 2x = 13
3x - 2x = 13 + 1
x = 14

Sendo U = R, x = 14

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i)
x - 1 = 10
x = 10 + 1
x = 11

Sendo U = R, x = 11

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j)
2x - 3 = 3x + 1
- 3 - 1 = 3x - 2x
- 4 = x
x = - 4

Sendo U = R, x = - 4

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k)
4x - 5 = 3x + 1
4x - 3x = 1 + 5
x = 6

R.: Sendo U = R, x = 6.