Question

Exercicios 1) Resolva as equações, sendo U=Q: a) X-7 = 0.
b) 5x = 20
c) 2x + 6 = 12.
d) -x + 8 = 0.
e) 3x +9=0.
f) 3x + 15 = 2x + 18
g)18X - 43 = 65
h) 23x - 16 = 14 - 17x
N) 10y- 5.(1 + y) = 3. (2y - 2) - 20
j) 3-2.(x + 3) = x - 18
k) 50 + (3x - 4) = 2.(3x - 4) + 26
l) x-5 + 1-2x = 3-x
10 5 4
m) 2x + 6 = x + 18
n) 3x + 5 = 2
o) 2x + 3.(X-5) = 4x + 9​

Answer 1

Resposta:

Explicação passo a passo:

a)x-7=0

x=7

b)5x=20

x=20/5

x=4

c)2x+6=12

2x+6-12=0

2x-6=0

2x=6

x=6/2

x=3

d)-x+8=0 (-1)

x-8=0

x=8

e)3x+9=0

3x=-9

x=-9/3

x=-3

f)3x+15=2x+18

3x-2x+15-18=0

x-3=0

x=3

g)18x-43=65

18x-43-65=0

18x-108=0

18x=108

x=108/18

x=6

h)23x-16=14-17x

23x+17x-16+14=0

40x-2=0

40x=2

x=2/40✔️

J)3-2.(x+3)=x-18

3-2x-6=x-18

-2x-x-3+6+18=0 (-1)

2x+x+3-6-18=0

3x-3-18=0

3x-21=0

3x=21

x=21/3

x=7

m)2x+6=x+18

2x-x+6-18=0

x-12=0

x=12

n)3x+5=2

3x+5-2=0

3x+3=0

3x=-3

x=-3/3

x=-1

Solução X E {-1}