Question

calcule o valor de x de modo que 2x-4=3 proxima 4x+2=-18

Answer 1

$2x-4=3 \\ 2x=3+4 \\ 2x=7 \\ x=7/2 \\ x= \frac{7}{2} \\ \\ 4x+2=-18 \\ 4x=-18-2 \\ 4x=-20 \\ x=-20/4 \\ x=-5$

Answer 2

2x - 4 = 3 ⇔ 2x = 3 +4 ⇔ 2x =7 ⇔ x = 7/2 = 3,5 

4x +2 = -18 ⇔ 4x= -18-2 ⇔ 4x = -20 ⇔x = -20/4 =-5