Question

determine o conjunto solução de cada equação:
A) 18x - 43=65
B) 23x-16=14-17x
C)10x -5.(1+x)=3.(2x -2) - 20
D) 2x+7=17
E) 4.(x+3)-x=24+xf)x-3=7
G) x+4=10
H)2.(x+5)-3.(5-x)=5

Answer 1

Ola Thauany

a)

18x - 43 = 65 
18x = 65 + 43 = 108
x = 108/18 = 6 

b)

23x - 16 = 14 - 17x
23x + 17x = 14 + 16
40x = 30
x = 30/40 = 3/4 

c)

10x -5*(1 + x) = 3*(2x - 2) - 20
10x - 5 - 5x = 6x - 6 - 20
5x - 5 = 6x - 26 
6x - 5x = 26 - 5
x = 21

d)

2x + 7 = 17
2x = 17 - 7 = 10
x = 10/2 = 5

e) 

4*(x + 3) - x = 24 + x
4x + 12 - x = 24 + x
4x - x - x = 24 - 12
2x = 12
x = 12/2 = 6

f)

x - 3 = 7
x = 7 + 3 = 10

g)

x + 4 = 10
x = 10 - 4 = 6

h)

2*(x + 5) - 3*(5 - x) = 5
2x + 10 - 15 + 3x = 5
5x = 5 + 5 = 10
x = 10/5 = 2

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