Question

Resolva as equações!

a)3x-1=2x+5
b) 6x-9=4x+10
c)9x-4=5x-12
d)4x+2x+9-10+x
e)6y+4+2y=9-5y
f)4x-3=3x+2
g)5x-3+2x=3x+10

RAPIDO!!!!

Answer 1

a)3x-1=2x+5

3x - 2x = 5 + 1

x= 6

b) 6x-9=4x+10

6x - 4x = 10 + 9

2x = 19

x= 19/2

c)9x-4=5x-12

9x - 5x = - 12 + 4

4x = - 8

x= - 8/4

x= - 2

d)4x+2x+9-10+x

4x + 2x + x + 9 - 10

6x + x - 1

7x - 1

e)6y+4+2y=9-5y

6y + 2y + 5y = 9 - 4

8y + 5y = 5

13y = 5

y= 5/13

f)4x-3=3x+2

4x - 3x = 2 + 3

x= 5

g)5x-3+2x=3x+10

5x + 2x - 3x = 10 + 3

7x - 3x = 13

4x = 13

x= 13/4

Answer 2

a)      3x - 1 = 2x + 5  ⇔

   ⇔ 3x - 2x = 5 + 1 ⇔

   ⇔ x = 6

b)      6x - 9 = 4x + 10  ⇔

   ⇔ 6x - 4x = 10 + 9 ⇔

   ⇔ 2x = 19 ⇔

   ⇔ x = 19/2

c)      9x - 4 = 5x - 12  ⇔

   ⇔ 9x - 5x = -12 + 4 ⇔

   ⇔ 4x = -8 ⇔

   ⇔ x = -8/4 ⇔

   ⇔ x = -2

d)      4x + 2x + 9 - 10 + x =

     = 4x + 2x + x + 9 - 10 =

     = 7x - 1

e)      6y + 4 + 2y = 9 - 5y   ⇔

   ⇔ 6y + 2y + 5y = 9 - 4 ⇔

   ⇔ 13y = 5 ⇔

   ⇔ y = 5/13

f)      4x - 3 = 3x + 2   ⇔

   ⇔ 4x - 3x = 2 + 3 ⇔

   ⇔ x = 5

g)      5x - 3 + 2x = 3x + 10  ⇔

   ⇔ 5x + 2x - 3x = 10 + 3 ⇔

   ⇔ 4x = 13 ⇔

   ⇔ x = 13/4