Question

7) Resolva a equação e determine o valor de x
- X-5 + 4x = - 7x + 6x + 15
a) x = 0.
b) x= 1
C) x= 3.
d) x= 4.
e) x= 5.

Answer 1

Resposta:

X - 5 + 4X = 7X + 6X + 15

3X - 5 = 7X + 6X + 15

3X - 5 = 13X + 15

3X - 5 - 13X - 15 = 0

3X - 5 - 13X - 15 = 0

-10X - 5 - 15 = 0

3X - 5 - 13X - 15 = 0

-10X - 20 = 0

-10X - 20 = 0

X + 2 = 0

X + 2 = 0

Letra A) 0