Question

Resolva as seguintes equação do 1grau sendo u=r. l)-3 x-2=2x+1 m)4x+3=5x+7 n)x-2+4=5x-1 O)2x+11=3 p)3x+2=4

Answer 1

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

R.: Sendo U = R, x = - 3/5

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m)
4x + 3 = 5x + 7
3 - 7 = 5x - 4x
- 4 = x
x = - 4

R.: Sendo U = R, x = - 4

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n)
x - 2 + 4 = 5x - 1
x + 2 = 5x - 1
2 + 1 = 5x - x
3 = 4x
4x = 3
x = 3/4

R.: Sendo U = R, x = 3/4

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O)
2x + 11 = 3
2x = 3 - 11
2x = - 8
x = -8/2
x = - 4

R.: Sendo U = R, x = - 4

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p) 
3x + 2 = 4
3x = 4 - 2
3x = 2
x = 2/3

R.: Sendo U= R, x = 2/3

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