Question

Agora é com voce; determine o valor do termo desconhecido.
a) 2 x+1 = 1/5
b) 5 x-3 = 2/8=
c) 2/9 = x+1/18
obs: são frações
help me please!​

Answer 1

a)

$2x + 1 = \frac{1}{5}$

$2x = \frac{1}{5} - 1$

$2x = - \frac{4}{5}$

$x = - \frac{4}{5} \times \frac{1}{2}$

$x = - \frac{2}{5}$

__________

b)

$5x - 3 = \frac{2}{8}$

$5x = \frac{2}{8} + 3$

$5x = \frac{26}{8}$

$x = \frac{26}{8} \times \frac{1}{5}$

$x = \frac{13}{20}$

__________

c)

$\frac{2}{9} = x + \frac{1}{18}$

$\frac{2}{9} - \frac{1}{18} = x$

$\frac{3}{18} = x$

$x = \frac{1}{6}$

Espero ter ajudado

Answer 2

Explicação passo-a-passo:

a) 2x+1=1/5 m.m.c=5

10x+5=1

10x=1-5

10x= -4

x= -4/10 :(2/2)

x= -2/5

b)5x-3=2/8 m.m.c=8

40x-24=2

40x=2+24

40x=26

x=26/40 :(2/2)

x=13/20

c)2/9=x+1/18 m.m.c= 18

4=18x+1

4-1=18x

3=18x

x=3/18 :(3/3)

x=1/6