Question

Resolva as equações:
a)
4x + 28 = 3x +52 b)

7x +35 = 2x +100

c)
3.(x −1) = 2.(x + 9) d)

6.(2x + 4) = 7.(x +8)

Answer 1

Resposta:

a) 4x + 28 = 3x + 52

4x-3x = 52 -28

x = +24

b) 7x + 35= 2x + 100

7x - 2x = 100 - 35

5x = 65

x = 65/5

x = 13

c) 3(x-1)= 2(x+9)

3x-3 = 2x+18

3x-2x= 18+3

x= 21

d) 6(2x+4)= 7(x+8)

12x+24 = 7x + 56

12x-7x =  56-24

5x=32

x= 32/5

x= 6,4

Explicação passo-a-passo:

Answer 2

Resposta:

a) 4x+28=3x+52

4x-3x=52-28

x=24

------------------

b) 7x+35=2x+100

7x-2x=100-35

5x=65

x=65/5

x=13

-----------------

c) 3.(2x+4)=7.(x+8)

5x+12=7x+56

12-56=7x-5x

-44=2x

-44/2=x

-22=x

--------------------

6.(2x+4)=7.(x+8)

12x+24=7x+56

12x-7x=56-24

5x=32

x=5/32