Question

Resolva As Seguintes Equacões do 1° Grau :
1- x + 4 =11
2- 5x= 4x+8
3- 2x +5= 12
4- 2x + 8= x -4
5-6x +9= 4x+9

Answer 1

1)
x + 4 = 11
x = 11 - 4
x = 7
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2)
5x = 4x + 8
5x - 4x = 8
x = 8
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
3)
2x + 5 = 12
2x = 12 - 5
2x = 7
x = 7/2
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4)
2x + 8 = x - 4
2x - x = - 4 - 8
x = - 12
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
5)
6x + 9 = 4x + 9
6x - 4x = 9 - 9
2x = 0
x = 0/2
x = 0
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨

Answer 2

$1. \\ x+4=11 \\ \\ x=11-4 \\ \\ x=7 \\ \\ \\ 2. \\ 5x=4x+8 \\ \\ 5x-4x=8 \\ \\ x=8 \\ \\ \\ 3. \\ 2x+5=12 \\ \\ 2x=12-5 \\ \\ 2x=7 \\ \\ x= \frac{7}{2} \\ \\ \\ 4. \\ 2x+8=x-4 \\ \\ 2x-x=-4-8 \\ \\ x=-12 \\ \\ \\ 5. \\ 6x+9=4x+9 \\ \\ 6x-4x=9-9 \\ \\ 2x=0 \\ \\ x=0$