Question

Qual e a resposta dessas equação de 1 grau a)5 (1-×)+4 (×+2)=×-4
b)8 (2+×)+2 (×-3)=-2×+1
c)3 (6+×)-2 (×-1)=-6×+1
d)4 (1-×)+9 (×+3)=-2×-2
e)9 (2-×)+8 (×+5)=6×+5

Answer 1

Explicação passo-a-passo:

a) 5.(1 - ×) + 4 (× + 2) = × - 4

5 - 5x + 4x + 8 = x - 4

- 5x + 4x - x = - 4 - 8 - 5

- 2x = - 17

2x = 17

x = 17 / 2 = 8,5

b) 8.(2 + ×) + 2 (x - 3) = - 2x +1

16 + 8x + 2x - 6 = - 2x + 1

8x + 2x + 2x = 1 + 6 - 16

12x = - 9

x = - 9 / 12 = - 0,75

c) 3.(6 + ×) - 2 (× - 1) = - 6× + 1

18 + 3x - 2x + 2 = - 6x + 1

3x - 2x + 6x = 1 - 2 - 18

7x = - 19

x = - 19 / 7 = aprox. - 2,71

d) 4.(1 - x) + 9 (× + 3) = - 2× - 2

4 - 4x + 9x + 27 = - 2x - 2

- 4x + 9x + 2x = - 2 - 4 - 27

7x = - 33

x = - 33 / 7 = aprox. - 4,71

e) 9.(2 - x) + 8 (× + 5) = 6× + 5

18 - 9x + 8x + 40 = 6x + 5

- 9x + 8x - 6x = 5 - 18 - 40

- 7x = - 53

7x = 53

x= 53 / 7 = aprox. 7,57