Question

Resolva as seguintes equações,sendo U=Q

B)3 (x - 2) = 4 (-x + 3) = { }

C)2 (x + 1) - (x - 1) = 0 = { }

D)5 (x + 1) - 3 (x + 2) = 0 = { }

Answer 1

B)3.(x - 2) = 4 (-x + 3) = { }

3x - 6 = - 4x + 12
3x + 4x = 12 + 6
7x = 18
x = 18/7

S: {18/7}


¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨


C)2 (x + 1) - (x - 1) = 0 = { }

2x + 2 - x + 1 = 0
x + 3 = 0
x = - 3

S: { - 3}

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
D)5 (x + 1) - 3 (x + 2) = 0 = { }

5x + 5 - 3x - 6 = 0
2x - 1 = 0
2x = 1
x = 1/2

S: {1/2}

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