Question

(Valendo 47 pontos) resolvam PFV

X+3X=8+2


5X+2=2X-1

Answer 1

a)
$x + 3x = 8 + 2 \\ 4x = 10 \\ x = \frac{10}{4} \\ x = 2.5$
x= 2,5

b)
$5x + 2 = 2x - 1 \\ 5x - 2x = - 1 - 2 \\ 3x = - 3 \\ x = \frac{ - 3}{3} \\ x = - 1$

x= -1