Question

1°)Resolva as seguintes equações, sendo U=Q

A)2 (x - 1) - 1 = 8
B)2 (x - 7) - 1 (5 - x) = 2
C)2 (x + 8) = 30
D)8 - 2 (x + 5) = 5
E)3 (x - 1) - 4 (x - 2) = 6

Answer 1

Resposta:

A)

$2x - 2 - 1 = 8$

$2x = 8 + 2 + 1$

$2x = 11$

$x = \frac{11}{2}$

$x = 5.5$

B)

$2x - 14 - 5 - x = 2$

$2x - x = 2 + 14 + 5$

$x = 21$

C)

$2x + 16 = 30$

$2x = 30 - 16$

$2x = 14$

$x = \frac{14}{2}$

$x = 7$

D)

$8 - 2x + 10 = 5$

$- 2x = 5 - 10 - 8$

$- 2x = - 13 \: \: \: .( - 1)$

$2x = 13$

$x = \frac{13}{2}$

$x = 6.5$

E)

$3x + 3 - 4x - 8 = 6$

$3x - 4x = 6 + 8 - 3$

$- x = 11 \: \: \: \: \: \: .( - 1)$

$x = - 11$

espero ter ajudado ♥️