1) Resolva as equações do 1 grau
a) 5x + 6x - 16 = 3x + 2x - 4
b) 7p + 15 - 5p 10 = - 17 + 13p
c) 5x + 4 - 2x = 26 - 3x
d) 17x - 2 + 4 = 10 + 5x
e) 2 - 4x= 32 - 18x + 12
f) 2x + 1 = 3 - 3x + 16
g) y - 8 + 5y = -3 + 2y + 7
h) 10x - 8 -2 = 7x - 4
i) 4x - 15 = -2x + 3
j) 3x + 2 = 2x - 11
k) 5m - 7 - 2m - 2 = 0
l) 10 - 9x + 2x = 2 - 3x
ME AJUDEM POR FAVOR
OBS. : CONTA ARMADA
Soluções para a tarefa
a)5x +6x - 16 = 3x + 2x - 4
30x -x 16 = 3x + 2x - 4
30x - 16 = 5x - 4 (Inverte o sinal)
30x - 16 - 5x = 4
30x - 5x = -4 + 16
-4 + 16
x = 12/25
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b) 7p + 15 - 5p 10 = -17 + 13p
7p + 15 - 50p = +17 + 13p
- 43p + 15 = -17 + 13p
- 43p + 15 - 13p = -17
- 43p - 13p = -17 - 15
- 56p = -17 - 15
- 56p = -32
p = 4/7
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c) 5x + 4 - 2x = 26 - 3x
3x +4 = 26 - 3x
3x + 4 + 3x = 26
3x + 3x = 26 - 4
6x = 26 - 4
6x = 22
x = 11/3
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d) 17x - 2 + 4 = 10 + 5x
17x +2 = 10 + 5x
17x 2 - 5x = 10
17x - 5x = 10 -2
12x = 10 - 2
12x = 8
x= 2/3
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e) 2 - 4x = 32 - 18x + 12
2 - 4x = 44 - 18x
2 - 4x + 18x = 44
- 4x + 18x = 44 - 2
14x = 44 - 2
14x = 42
x = 3
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f) 2x + 1 = 3 - 3x + 16
2x + 1 = 19 - 3x
2x + 1 + 3x = 19
2x + 3x = 19 - 1
5x = 19 - 1
5x = 18
x = 18/5
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g) y - 8 + 5y = -3 + 2y + 7
6y - 8 = -3 + 2y + 7
6y - 8 = 4 + 2x
6y - 8 - 2y = 4
6y - 2y = 4 + 8
4y = 4 + 8
4y = 12
y = 3
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h) 10x - 8 - 2 = 7x - 4
10x - 10 = 7x - 4
10x - 10 - 7x = -4
10x - 7x = -4 + 10
3x = -4 + 10
3x = 6
x = 2
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i) 4x - 15 = - 2x + 3
4x - 15 + 2x = 3
4x + 2x = 3 + 15
6x = 3 + 15
6x = 18
x = 3
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j) 3x + 2 = 2x - 11
3x + 2 - 2x = - 11
3x - 2x = - 11 - 2
x = - 11 - 2
x = - 13
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k) 5m - 7 - 2m - 2 = 0
3m - 7 - 2 = 0
3m = 9
m = 3
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l) 10 - 9x + 2x = 2 - 3x
10 - 7x = 2 - 3x
10 - 7x + 3x = 2
- 7x +3x = 2 - 10
- 4x = 2 - 10
- 4x = -8
x = 2
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Prontinho! (≧▽≦)