Question

Podem me ajudar com a e e a f?

Answer 1

e)

$- 1 .(x + 4) = 3 .(x + 5)\\-x - 4 = 3x + 15\\-4x = 19\\-x = \frac{19}{4}\\ x = -\frac{19}{4}$

f)

$3 (\frac{1}{3} - x) - (-2 + 7) = -3\\\frac{3}{3} - 3x + 2x - 7 = -3\\1 - 3x + 2x - 7 = -3\\-x = -3 + 7 - 1\\-x = 3\\x = -3$