Question

Resolva as equações abaixo:

a)16x-1=12x+3
b)3x-2=4x+9
c)5x-3+x=2x+9
d)3(5-x)-3(x+4)=15
e)3(5-x)-3(1-2x)=42
f)(4x+6)-2x=(x-6)+10+14
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Answer 1

Resposta:

A) x=1

B) x=-11

C) x=3

D) x=-2

E) x=10

F) x=12

Explicação passo a passo:

A) 16x-1=12x+3

16x-12x=3+1

4x=4   =   x=4/4  =   x=1

B) 3x-2=4x+9

3x-4x=9+2

-1x=11     =   x=11/-1    X=-11

C) 5x-3+x=2x+9

5x+x-2x=9+3

4x=12   =  x=12/4   =    x=3

D) 3(5-x)-3(x+4)=15

15-3x-3x-12=15

-3x-3x=15-15+12

-6x=12   =   x=12/-6  = x=-2

E) 3(5-x)-3(1-2x)=42

15-3x-3+6x=42

-3x+6x=42-15+3

3x=30  =  x=30/3   =  x=10

F) (4x+6) -2x=(x-6)+10+14

4x+6-2x=x-6+10+14

2x+6=x+18

2x-x=18-6

x=12