Question

resolva as equações abaixo

a) 10x+16=14x+8
b)2(x-3)=-3(x-3)
c)4(5x-3)-64(3-x)-3(12x-4)=96
d)5(x+1)+6(x+2)=9(x+3)

Answer 1

Resposta:

a)

10x + 16 = 14x + 8

10x - 14x = 8 - 16

(- 4x = - 8). -1

4x = 8

x = 8/4

x = 2

b)

2(x - 3) = - 3(x-3)

2x - 6 = - 3x + 9

2x + 3x = 9 + 6

5x = 15

x = 15/5

x = 3

c)

4(5x - 3) - 64(3 - x) - 3(12x - 4) = 96

20x - 12 - 192 + 64x - 36x + 12 = 96

20x + 64x - 36x = 96 + 12 - 12 + 192

48x = 288

x = 288/48

x = 6

d)

5(x + 1) + 6(x + 2) = 9(x + 3)

5x + 5 + 6x + 12 = 9x + 27

5x + 6x - 9x = 27 - 5 - 12

2x = 10

x = 10/2

x = 5