Question

oi gente sou eu dnvk, me ajudeeeem​

Answer 1

Vamos lá !!

Resolução :

• Numero 4

$4.(2x - 3) = 5.(x + 3)$

$8x - 12 = 5x + 15$

$8x - 5x = 15 + 12$

$3x = 27$

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

$\boxed{\red{x = 9}}$

• Numero 5

$\frac{x}{3} - \frac{7}{8} = \frac{x}{4} - \frac{ - 1}{1}$

Mmc

$3 , 8 , 4 / 2$

$3 , 4 , 2 / 2$

$3 , 2 , 1 / 2$

$3 , 1 , 1 / 3$

$1 , 1 , 1$

$2 \times 2 \times 2 \times 3$

$4 \times 6$

$24$

Final

$\frac{8x - 21 = 6x - 24}{24}$

$8x - 21 = 6x - 24$

$8x - 6x = - 24 + 21$

$2x = - 3$

$\boxed{\red{x = \frac{ - 3}{2} }}$

Bons estudos .