Question

resolva as equaçoes
4{x + 1]=12

5[3 - x]- 4x =18

Answer 1

4 {x + 1}=12
x + 1 =3
x =3 - 1
x=2


5[3 - x] - 4 x =18
15 - 5x - 4x =18
15 - 9x =18
-9x =18 - 15
-9x =3
x = - \frac{3}{9}
x = - \frac{1}{3}