Question

Resolva estas equações. a) 3-2(x+3)=x-18 b)3(x-4)=-1-(3x-1) c)5(x/5-1)=x-6(2x/3+4) d)50+(3x-4)=2(3x-4)+26 e)x/2+4x=15-(-x-6) f)2(2x-4)=5-(x/2+4)

Answer 1

Resposta:

a) 3-2(x+3)=18

3-2x-6=18

-2x=18+3

x=-21/2

b)3(x-4)=-1-(3x-1)

3x-12=-1-3x+1

6x=12

x=4

c)5(x/5-1)=x-6(2x/3+4)

x-5=x-4x-24

4x=-21

-21/4

d)50+(3x-4)=2(3x-4)+26

50+3x-4=6x-8+26

-3x=18-50+4

-3x=-28

x=28/3

e)x/2+4x=15-(-x-6)

x/2+4x=15+x-90

x/2+4x-x=-105

7x/2=-105

x=-30

f)2(2x-4)=5-(x/2+4)

4x-8=5-x/2+20

4x+x/2=33

9x/2=33

9x=66

x=66/9

x=22/3

Explicação passo-a-passo: