Question

a) 3(x - 2) = 2x - 4
b) 5x - 3(x + 2) = 15
c) 3x – 2(4x - 3) = 2 - 3(x - 1)​

Answer 1

Vamos lá!!

Resolução :

• Letra A

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

$3x - 6 = 2x - 4$

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

$\red{x = 2}$

• Letra B

$5x - 3(x + 2) = 15$

$5x - 3x - 6 = 15$

$2x = 15 + 6$

$2x = 21$

$\red{x = \frac{21}{2} }$

• Letra C

$3x - 2(4x - 3) = 2 - 3(x - 1)$

$3x - 8x + 6 = 2 - 3x + 3$

$- 5x + 3x = 5 + 6$

$- 2x = 11$

$- 2x = 11 \times ( - 1)$

$2x = - 11$

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

Bons estudos .