Question

3)resolva as equaçoes a)2x+30=80 b)3x-10=35 c)5x+34=4 d)6x-5=4x-8 e)2x+5-5x=-1 f)5+6x=5x+2 g)x+2X-1-3=x h)-3x+10=2x+8+1 I)5x-5+x=9+x j)7x-4-x=2x+8​

Answer 1

Resposta:

a) 2x+30=80

2x=80-30

2x=50

x=50/2

x=25

b) 3x-10=35

3x=35+10

3x=45

x=45/3

x=15

c) 5x+34=4

5x=4-34

5x=-30

x= -30/5

x=-6

d) 6x-5=4x-8

6x-4x=-8+5

2x=-3

x= -3/2

x=-1,5

e) 2x+5-5x=-1

2x+5x=-1-5

7x=-6

x= -6/7

x= 1,1666...

f) 5+6x=5x+2

6x-5x=2-5

1x=-3

x= -3/1

x= -3

g) x+3x-1-3=x

4x+x=3+1

5x=4

x=4/5

x= 0,8

h) -3x+10=2x+8+1

-3x-2x=8+1-10

-5x=9-10

-5x=-1

x= -1/-5

x= 0,2

i) 5x-5+x=9+x

5x+x+x=9+5

6x+x=14

7x=14

x=14/7

x=2

j) 7x-4-x=2x+8

7x-x-2x=8+4

6x-2x=12

4x=12

x=12/4

x=3

Espero ter ajudado! :)

Ass: Fabiane Marques <3