Question

1-resolva as equações

a) 4x-1=3(x-1)

b) 3(x-2)=2x-4

c) 2(x-1)=3x+4

d) 3(x-1)-7=15

e) 7(x-4)=2x-3

f) 3(x-2)=4(3-x)

g) 3(3x-1)=2(3x+2)

h) 7(x-2)=5(x+13)

gente me ajuda pfv eeh pra eu mostrar pro meu professor amanhã

Answer 1

a)
$4x - 1 = 3x - 3 \\ 4x - 3x = - 3 + 1\\ x = - 2$
b)
$3x - 6 = 2x - 4 \\ 3x - 2x = - 4 + 6 \\ x = 2$
c)
$2x - 2 = 3x + 4 \\ 2x - 3x = 4 + 2 \\ - x = 6 \\ x = - 6$
d)
$3x - 3 - 7 = 15 \\ 3x = 15 + 7 + 3 \\ 3x = 25 \\ x = 25 \div 3 \\ x = 8.33$
e)
$7x - 28 = 2x - 3 \\ 5x = - 3 + 28 \\ 5x = 25 \\ x = 5$
f)
$3x - 6 = 12 - 4x \\ -7x = 18 \\ x = 18 \div 7 \\ x = 2.57$
g)
$9x - 3 = 6x + 4 \\ 3x = 7 \\ x = 2.33$
h)
$7x - 14 = 5x + 65 \\ 2x = 79 \\ x = 39.5$