Question

resolva as equações abaixo a)5x-12=3 b)3x+1=-3 c)5x+5=3x+7 d)6x+3=-9 e)4x-10=3x-3-4 f)3x-6+10=4x+4+2 g)3x+4x-4=x+20 h)3x+6x+6=3x+8 I)-3x+18=-13x+10x+4x-2 ajudem porfavor!!!​

Answer 1

Resposta:

a) 5x-12=3

5x=3+12

5x=15

x=3

b) 3x+1=-3

3x=-3-1

3x= -4

= -4/3

c)5x+5=3x+7

5x+5-3x=7

5x-3x=7-5

2x=7-5

2x=2

x=1

d) 6x= -9-3

6x=-12

x=-2

e) 4x-10=3x-3-4

4x-10=3x-7

4x-10-3x=-7

4x-3x=-7+10

x=-7+10

x=3

f) 3x-6+10=4x+4+2

3x+4=4x+4+2

3x+4=4x+6

3x+4-4x=6

3x-4x=6-4

-x=6-4

-x=2

x=-2

g) 3x+4x-4=x+20

7x-4=x+20

7x-4-x=20

7x-x=20+4

6x=20+4

6x=24

x=4

h) 3x+6x+6=3x+8

6x+6=8

6x=8-6

6x=2

x= 1/3

i) -3x+18=-13x+10x+4x-2

-3x+18=x-2

-3+18-x=-2

-3-x=-2-18

-4x=-2-18

-4x=-20

x=5