Question

Determine x
a)6x=2x+16
b)2x-5=x+1
c)2x+3=x+4
d)5x+7=4x+10
e)4x-10=2x+2
f)4x-7=8x-2
g)2x+1=4x-7
h)9x+9+3x=15

OBS:Preciso das contas pfv

Answer 1

Resposta:

a)6x=2x+16

$6x - 2x - 16 = 0 \\ 4x - 16 = 0 \\ 4x = 16 \div (4) \\ x = 4$

b)2x-5=x+1

$2x - 5 - x - 1 = 0 \\ x - 6 = 0 \\ x = 6$

c)2x+3=x+4

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

d)5x+7=4x+10

$5x + 7 - 4x - 10 = 0 \\ x - 3 = 0 \\ x = 3$

e)4x-10=2x+2

$4x - 10 - 2x - 2 = 0 \\ 2x - 12 = 0 \\ 2x = 12 \div (2) \\ x = 6$

f)4x-7=8x-2

$4x - 7 - 8x + 2 = 0 \\ - 4x - 5 = 0 \\ - 4x = 5 \times ( - 1) \\ 4x = - 5 \\ \\ x = - \frac{5}{4}$

g)2x+1=4x-7

$2x + 1 - 4x + 7 = 0 \\ - 2x + 8 = 0 \\ - 2x = - 8 \times ( - 1) \\ 2x = 8 \div (2) \\ x = 4$

h)9x+9+3x=15

$9x + 9 - 3x - 15 = 0 \\ 6x - 6 = 0 \\ 6x = 6 \div (6) \\ x = 1$