Question

1-Calcule o valor de x (coloquem a conta pfv)

(• quer dizer vezes)


A) 9•x+4=36•3•x


B) 7•x-8=-31•x-6


C) 99•x-6=50•X


D) 7•x•6=3•x-8


E) 6•x-9=-36•x


F) x-17=-51 •x


G) -x-3•x -8•x=-9+7•x


H) -x=-51-50


I)53• x -1= 60

Answer 1

Resposta:

A) x=4/99

B) x=1/19

C) x=6/49

D) x=-8/39

E) x=3/14

F) x=17/52

G) x=9/19

H) x=101

I) x=61/53

Explicação passo-a-passo:

A) 9x+4=36•3x <=> (9x+4)/3x=36 <=> (9x+4)/3x=108x/3x <=> 9x+4=108x <=> 9x-108x=-4 <=> -99x=-4 <=> x=4/99

B) 7x-8=-31x-6 <=> 7x+31x=-6+8 <=> 38x=2 <=> x=2/38 <=> x=1/19

C) 99x-6=50x <=> 99x-50x=6 <=> 49x=6 <=> x=6/49

D) 7x•6=3x-8 <=> 7x=(3x-8)/6 <=> 42x/6=(3x-8)/6 <=> 42x=3x-8 <=> 42x-3x=-8 <=> 39x=-8 <=> x=-8/39

E) 6x-9=-36x <=> 6x+36x=9 <=> 42x=9 <=> x=9/42 <=> x=3/14

F) x-17=-51x <=> x+51x=17 <=> 52x=17 <=> x=17/52

G) -x-3x-8x=-9+7x <=> -12x-7x=-9 <=> -19x=-9 <=> x=9/19

H) -x=-51-50 <=> -x=-101 <=> x=101

I) 53x-1=60 <=> 53x=60+1 <=> 53x=61 <=> x=61/53