Resolva as seguintes equações sendo U=Q
• 5 (2x-1)=2 (x+4)
• 2 (x-1) +3 (x-2)=2
• x-2 (x-1)=4-3 (x-2)
Soluções para a tarefa
Respondido por
2
a)
5.(2x - 1) = 2.(x + 4)
10x - 5 = 2x + 8
10x - 2x = 8 + 5
8x = 13
x = 13/8
*****************************
b)
2.(x - 1) + 3.(x - 2) = 2
2x - 2 + 3x - 6 = 2
2x + 3x - 2 - 6 = 2
5x - 8 = 2
5x = 2 + 8
5x = 10
x =10/5
x = 2
*********************************
c)
x - 2.(x - 1) = 4 - 3.(x - 2)
x - 2x + 2 = 4 - 3x + 6
- x + 2 = 10 - 3x
- x + 3x = 10 - 2
2x = 8
x = 8/2
x = 4
5.(2x - 1) = 2.(x + 4)
10x - 5 = 2x + 8
10x - 2x = 8 + 5
8x = 13
x = 13/8
*****************************
b)
2.(x - 1) + 3.(x - 2) = 2
2x - 2 + 3x - 6 = 2
2x + 3x - 2 - 6 = 2
5x - 8 = 2
5x = 2 + 8
5x = 10
x =10/5
x = 2
*********************************
c)
x - 2.(x - 1) = 4 - 3.(x - 2)
x - 2x + 2 = 4 - 3x + 6
- x + 2 = 10 - 3x
- x + 3x = 10 - 2
2x = 8
x = 8/2
x = 4
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