Question

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+3).




me ajudem pfv

Answer 1

Resposta:

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

$4x - 1 = 3x - 3 \\ 4 x - 1 - 3x + 3 = 0 \\ x + 2 = 0 \\ x = - 2$

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

$3x - 6 = 2x - 4 \\ 3x - 6 - 2x + 4 = 0 \\ x - 2 = 0 \\ x = 2$

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

$2x - 2 = 3x + 4 \\ 2x - 2 - 3x - 4 = 0 \\ - x - 6 = 0 \\ - x = 6 \times ( - 1) \\ x = - 6$

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

$3x - 3 - 7 = 15 \\ 3x - 10 - 15 = 0 \\ 3x - 25 = 0 \\ 3x = 25 \\ \\ x = \frac{23}{5}$

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

$7x - 28 = 2x - 3 \\ 7x - 28 - 2x + 3 = 0 \\ 5x - 25 = 0 \\ 5x = 25 \\ \\ x = \frac{25}{5} \\ \\ x = 5$

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

$3x - 6 = 12 - 4x \\ 3x - 6 - 12 + 4x = 0 \\ 7x - 18 = 0 \\ 7x = 18 \\ \\ x = \frac{18}{7}$

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

$9x - 3 = 6x + 4 \\ 9x - 3 - 6x - 4 = 0 \\ 3x - 7 = 0 \\ 3x = 7 \\ \\ x = \frac{7}{3}$

h)7(x-2)=5(x+3)

$7x - 14 = 5x + 15 \\ 7x - 14 - 5x - 15 = 0 \\ 2x - 29 = 0 \\ 2x = 29 \\ \\ x = \frac{29}{2}$