Question

Resolva as seguintes equações no caderno.
1) 4x – 1 = 7
2) 3x – 9 = 12
3) 3x + 2 = 4x + 9
4) 5x – 2 + 12 = 6x + 4
5) 2x – 6 = 16
6) 3x – 4 + 2 = 2x – 4 + 12
7) 4x – 7 = 2x – 8
8) 6x – 3 = 12 – 9x
9) x + 4 – 3x = 4 - 12x
10) 6x – 4 + 12 = 3 + 4x – 9
11) –5 = 3x + 4 – 12 - 9x
12) 3x + 5 - 2 = 2x + 12
13) 3(x + 2) = 15
14) –2 (-x + 2) = 3 (2x + 2)
15) 12x + 3 (x – 1) = -2(x -1) + 12
16) 2 (x - 1) = 0
17) 3 (x +2) = 15
18) 2 (x + 2) = 12
19) x = -3 (x – 4)
20) 2 (x + 5) = -3 (x – 5)
21) –2 (x + 4) = -21 + 9 (x – 1)
22) 5 (x – 4) = 1 + 9 (x – 1)
23) –5 (x – 4) + 4 = 2 (-2 x – 2) + 9
24) -2 (x – 5) + 3x = - (x + 2) – 2
25) - (x + 5) – 6 = -9 (x – 3) – 6
26) x - 7 + 2 (x – 4) = -3 (x + 2) – 8

30) x 3 − 1 2 = − x 3

Answer 1

Resposta:

$4x = 7 + 1 \\ 4x = 8 \\ x = \frac{8}{4} \\ x = 2$

$3x = 12 + 9 \\ 3x =21 \\ x = \frac{21}{3} \\ x = 7$

$3x - 4x = 9 - 2 \\ - x = 7( - 1) \\ x = 7$

$5x - 6x = 4 - 10 \\ - x = - 6( - 1) \\ x = 6$

$2x = 16 + 6 \\ 2x = 22 \\ x = 11$

$3x - 2x = 8 + 2 \\ x = 10$

$4x - 2x = - 8 + 7 \\ 2x = - 1 \\ x = \frac{ - 1}{2}$

$6x + 9x = 12 + 3 \\ 15x = 15 \\ x = 1$

$x - 3x + 12x = 4 - 4 \\ 10x = 0 \\ x = 0$

$6x - 4x = - 6 - 8 \\ 2x = - 14 \\ x = - 7$

$- 3x + 9x = - 8 + 5 \\ 6x = - 3 \\ x = \frac{ - 3}{6}$

$3x - 2x = 12 - 3 \\ x = 9$

$3x + 6 = 15 \\ 3x = 15 - 6 \\ 3x = 9 \\ x = 3$

Explicação passo-a-passo:

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