Question

Ajudem ai galera. Valeu!
1- Resolva as equações.
b) 2x - 5 = x + 4

c) 9 - 4x - 4 = x + 7 - 1

d) 16x + 5 - 3 = -2x - 15

e) -x - 40 = 4x

Answer 1

b)2x-5= x + 4
2x - x = 4 + 5
x= 9
c)9- 4x -4 =x +7 -1
9-4-7+1=x+4x
-1=5x
x=-1/5
d) 16x + 5 -3= -2x-15
18x=-15-5+3
18x= -17
x= - 17/18
e)-x-40=4x
-40=4x+x
-40=5x
x=-8

Answer 2

b. 2x - x = 4 + 5
x = 9
c. -4x - x = -9 + 7 - 1
-5x = - 2 - 1
-5x = -3 .(-1)
5x = 3
x = 3/5

d. 16x + 2x = -5 + 3 - 15
18x = - 2 - 15
18x = - 17
x = -17/18

e. -x - 4x = 40
- 5x = 40 . (-1)
5x = -40
x = -40/ 5
x = -8