Question

a) 6x-3x=16-4

b) x-30+x=1

c) 2\3x+15=4

d) x+2=21

e) (x+6)-2=7

me ajudem por favor​

Answer 1

Resposta:

a)6x-3x=16-4

3x=12

x=12/3

x=4

b)x-30+x=1

x+x=1+30

2x=31

x=31/2. x=15,5

c)2/3x+15=4

2/3x=4-15

2/3x=-11

2=-33x

x=-2/33

d) x+2=21

x=21/2

x=10,5

E)(x+6)-2=7

x+6-2=7

x+4=7

x=7-4

x=3

Answer 2

Resposta:

a)x=4

b)x=31/2

c)x=-22/3

d)x=19

e)x=-19/2

Explicação passo-a-passo:

a)6x-3x=16-4⇔

⇔3x=12⇔

⇔x=12/3⇔

⇔x=4

b)x-30+x=1⇔

⇔2x=31⇔

⇔x=31/2

c)2/3x+15=4⇔

⇔2/3x=-11⇔

⇔x=-22/3

d)x+2=21⇔

⇔x=19

e)(x+6)-2=7⇔

⇔-2-12=7⇔

⇔-2x=19⇔

⇔2x=-19⇔

⇔x=-19/2