Question

Resolva as equações
A) x +4= 1
B) y -8= -6
C)5x = -25
D)x÷11 = -3,4
E) 2a +15= 171
F) 3n -8 = 18

Answer 1

a) X= 1-4
    X= -3

b) Y= -6+8
    Y=2

C) X=$\frac{-25}{5}$ = -5

D)

E) 2a= 171 - 15
   a= $\frac{156}{2}$
   a= 78

F) 3n = 18+8
    n= $\frac{26}{3}$
    n=8.6

Answer 2

A)
x + 4 = 1
x = 1 - 4
x = - 3

B)
y - 8 = - 6
y = - 6 + 8
y = 2

C)
5x = - 25
x = - 25/5
x = - 5

D)
x ÷ 11 = - 3,4
  x    =  - 3,4
-----
 11

x = 11.(-3,4)
x = - 37,4

E)
2a + 15 = 171
2a = 171 - 15
2a = 156
a = 156/2
a = 78

F)
3n - 8 = 18
3n = 18 + 8
3n = 26
n = 26/3