Question

. Resolva as equações do 1º grau:
a) 2x EXERCÍCIOS
1+ 10 = 0
b) 3x – 12 = 0
c) 5x + 25 = 0
d) 2x – 30 =0
e) 5x – 6 = 2x + 3
f) 2x – 5 = - x + 10
g) 3x – 4 = 2x + 10
h) 6x + 10 = 3x + 40

Answer 1

Explicação passo a passo:

a)2x+1+10=0

2x=-11

x= -11/2

b)3x-12=0

3x=+12

x= 12/3

x= 4

c)5x+25=0

5x= -25

x= -25/5

x= -5

d)2x-30=0

2x=30

x=30/2

x=15

e)5x-6=2x+3

5x-2x= 3+6

3x=9

x=9/3

x=3

f)2x-5=-x+10

2x+x=10+5

3x=15

x=15/3

x=5

g)3x-4=2x+30

3x-2x=30+4

x=34

h)6x+10=3x+40

6x-3x=40-10

3x=30

x=30/3

x=10

Answer 2

•
a) 1 + 10 = 0
9 = 0

b) 3x - 12 = 0
3x = 12
x = 12 : 3
x = 4

c) 5x + 25 = 0
5x = - 25
x = - 25 : 5
x = - 5

d) 2x - 30 = 0
2x = 30
x = 30 : 2
x = 15

e) 5x - 6 = 2x + 3
5x - 2x = 3 + 6
3x = 9
x = 9 : 3
x = 3

f) 2x - 5 = - x + 10
2x + x = 10 + 5
3x = 15
x = 15 : 3
x = 5

g) 3x - 4 = 2x + 10
3x - 2x = 10 + 4
x = 14

h) 6x + 10 = 3x + 40
6x - 3x = 40 - 10
3x = 30
x = 30 : 3
x = 10