Question

me ajuda com resposta com conta

Answer 1

Questão 11

a)

1/2*(b+6)-1/3(3-b)=1/5*(2b+7)

(b+6)/2-(3-b)/3=(2b+7)/5

(15b+90)/30-(30-10b)/30=(12b+7)/30

15b+90-30-10b=12b+42

15b-10b-12b=-90+30+42

-7b=-28

b=28/7

b=4

b)

-1/3*(m-4)+2/5*(2-3m)=2/6(-m-9)

(-m+4)/3+(4-6m)/5=(-2m-18)/6

(-10m+40)/30+(24-36m)/30=(-10m-90)/30

-10m-36m+10m=-90+40-24

-36m=-50-24

-36m=-74

m=(-74/(-36))/2

m=37/18

c)

(3a+2)/8+(a-5)/2-1/5=6/5

(15a+10)/40+(2a-100)/40-8/40=48/40

15a+2a=-10+100+8+48

17a=-10+156

17a=146

a=146/17

d)

(m+1)/9=(2m+3)/3

(m+1)/9=(6m+9)/9

m-6m=9-1

-5m=8

m=-(8/5)