EQUAÇÃO A) 2X + 2/3 + 3X-5/2 =9 B)3X + 1/5 - 2X + 3/ = X - 4 C) X - 1/3 = 2X - 2/6 D) X/3 +X/2 + 4 =X E) X + 1/2-X/3 = 2X+1/4 F) 5(2X - 4)=7 ( X + 1 ) - 3 G) X/3 + X/2 =15 H) ( X - 1)/4 - ( X -3)/6 + 3 I) X/2 - X/4 = 1/2 J) X/5 + X/2 = 7/10 K) 3X/4 - X/6 =5
Soluções para a tarefa
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A) 2X + 2 + 3X-5 =9 mmc = 6
3 2
12x + 8 + 9x - 15 = 54 ==> 21x = 54+ 7 ==> 21x = 61 ==> x = 61/21
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B)3X + 1 - 2X + 3 = X - 4 mmc = 5
5
15x + 1 - 5(x + 3) = 5(x-4) ==> 15x + 1 - 5x - 15 = 5x - 20
15x - 5x - 5x = - 20 - 1 +15 ==> 5x = - 6 ==> x = - 6/5
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C) X - 1 = 2X - 2 mmc = 6
3 6
2x - 2 = 2x - 2 ==> 2x - 2x = - 2 + 2 ==> 0x = 0 ==> indeterminação
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D) X + X + 4 = X mmc = 6
3 2
2x + 3x + 24 = 6x ==> 6x - 5x = 24 ==> x = 24
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E) X + 1 - X = 2X+1 mmc = 12
2 3 4
6x + 6 - 4x = 6x + 3 ==> 6x + 4x - 6x = 6 - 3
4x = - 3 ==> x = - 3/4
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F) 5(2X - 4)=7 ( X + 1 ) - 3
10x - 20 = 7x + 7 - 3 ==> 10x - 7x = 7 - 3 +20
3x = 24 ==> x = 8
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G) X + X =15 mmc = 6
3 2
2x + 3x = 90 ==> 5x = 90 ==> x = 18
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H) ( X - 1) - ( X -3) + 3 mmc = 12
4 6
3x - 3 - 2x + 6 + 36 ==> x + 39
12 12
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I) X - X = 1 mmc = 4
2 4 2
2x - x = 2 ==> x = 2
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J) X + X = 7 mmc = 10
5 2 10
2x + 5x = 7 ==> 7x = 7 ==> x = 1
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K) 3x - X = 5 mmc = 12
4 6
9x - 2x = 60 ==> 7x = 60 ==> x = 60/7
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