Question

Equação:
a) 4.(2x -3) = 5 . (x+3)
b) 10 - 4x = 9 + 2x
c) a - 3a + 5a = 12
d) 3 . (x - 1) = 6
e) 2 . (x + 5) = -4

Answer 1

$a)$

$4 \times (2x - 3) = 5 \times (x + 3)$

$8x - 12 = 5x + 15$

$8x - 5x = 15 + 12$

$3x = 27$

$x = \frac{27}{3}$

$\red{x = 9}$

$——————————————$

$b)$

$10 - 4x = 9 + 2x$

$- 4x - 2x = 9 - 10$

$- 6x = - 1$

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

$——————————————$

$c)$

$a - 3a + 5a = 12$

$3a = 12$

$a = \frac{12}{3}$

$\red{a = 4}$

$——————————————$

$d)$

$3 \times (x - 1) = 6$

$x - 1 = 2$

$x = 2 + 1$

$\red{x = 3}$

$——————————————$

$e)$

$2 \times (x + 5) = - 4$

$x + 5 = - 2$

$x = - 2 - 5$

$\red{x = - 7}$

Answer 2

Resposta:

1)8x-5x=15+12

3x=27

x=9

2)-4x-2x=9-10

-6x= -1

1

x=__

6

3)3a=12

a=4

4)x-1=2

x=2+1

x=3

5)x+5=-2

x= -2-5

x= -7

Espero ter ajudado

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