1) Simplifique e resolva as equações.
A) 4x - 3 - x + 8 = 11
B) 6.(x - 2) = 12
C) 9 + 2.(5x - 4) = 21
D) 10x + 4.(3 - 2x) - 6 = 8
E) 3.(5 + 3x) + 5.(- x - 1) = 22
F) 2.(9x - 4) - 7 + (6 - 5x).3 = 18
Soluções para a tarefa
Respondido por
705
A )
4x - 3 - x + 8 = 11
4x - x = 11 + 3 -8
3x = 6
x = 6/3
x = 2
B )
6.(x - 2) = 12
6x - 12 = 12
6x = 12 + 12
6x = 24
x = 24/6
x = 4
C)
9 + 2.(5x - 4) = 21
9 + 10x - 8 = 21
10x = 21 - 9 + 8
10x = 20
x = 20/10
x= 2
D)
10x + 4.(3 - 2x) - 6 = 8
10x + 12 - 8x - 6 = 8
10x - 8x = 8 - 12 + 6
2x = 2
x = 2/2
x = 1
E)
3.(5 + 3x) + 5.(- x - 1) = 22
15 + 9x - 5x - 5 = 22
9x - 5x = 22 - 15 + 5
4x = 12
x = 12/4
x = 3
F )
2.(9x - 4) - 7 + (6 - 5x).3 = 18
18x - 8 - 7 + 18 - 15x = 18
18x - 15x = 18 + 8 + 7 - 18
3x = 15
x = 15/3
x = 5
4x - 3 - x + 8 = 11
4x - x = 11 + 3 -8
3x = 6
x = 6/3
x = 2
B )
6.(x - 2) = 12
6x - 12 = 12
6x = 12 + 12
6x = 24
x = 24/6
x = 4
C)
9 + 2.(5x - 4) = 21
9 + 10x - 8 = 21
10x = 21 - 9 + 8
10x = 20
x = 20/10
x= 2
D)
10x + 4.(3 - 2x) - 6 = 8
10x + 12 - 8x - 6 = 8
10x - 8x = 8 - 12 + 6
2x = 2
x = 2/2
x = 1
E)
3.(5 + 3x) + 5.(- x - 1) = 22
15 + 9x - 5x - 5 = 22
9x - 5x = 22 - 15 + 5
4x = 12
x = 12/4
x = 3
F )
2.(9x - 4) - 7 + (6 - 5x).3 = 18
18x - 8 - 7 + 18 - 15x = 18
18x - 15x = 18 + 8 + 7 - 18
3x = 15
x = 15/3
x = 5
Respondido por
118
a) x = 2
4x - 3 - x + 8 = 11
4x - x = 11 + 3 - 8
3x = 6
x = 6/3
x = 2
b) x = 4
6 . (x - 2) = 12
6x - 12 = 12
6x = 12 + 12
6x = 24
x = 24/6
x = 4
c) x = 2
9 + 2 . (5x - 4) = 21
9 + 10x - 8 = 21
10x = 21 + 8 - 9
10x = 20
x = 20/10
x = 2
d) x = 1
10x + 4 . (3 - 2x) - 6 = 8
10x + 12 - 8x - 6 = 8
10x - 8x = 8 - 12 + 6
2x = 2
x = 2/2
x = 1
e) x = 3
3 . (5 + 3x) + 5 . (-x - 1) = 22
15 + 9x - 5x - 5 = 22
9x - 5x = 22 + 5 - 15
4x = 12
x = 12/4
x = 3
f) x = 5
2 . (9x - 4) - 7 + (6 - 5x) . 3 = 18
18x - 8 - 7 + 18 - 15x = 18
18x - 15x = 18 + 8 + 7 - 18
3x = 15
x = 15/3
x = 5
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Espero ter ajudado, um abraço! :)
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