Question

A)12x+32x+1400=100x
B)12x+1x=18x-90
C)8x=5 (39-x)
D)6x+6 (x-2,5)=69
E)(2x+1)6=90
F)2x+1-x=3
G)(x+2)9=9x+18
POR FAVOR ME AJUDEM...

Answer 1

Vamos lá;

a)12x+32x+1400 = 100x

12x+32x+-100x= -1400

-56x =-1400 (-1)

56x=1400

x=1400/56

x=25

b) 12x+1x=18x-90

12x+1x-18x=-90

-5x= -90 (-1)

5x=90

x=90/5

x=18

c) 8x=5(39-x)

8x=195-5x

8x +5x=195

13x=195

x=195/13

x=15

d) 6x+6(x-2,5)=69

6x+6x-15=69

12x=69+15

12x=84

x=84/12

x=7

e) (2x+1)6=90

12x+6=90

12x =90-6

12x=84

x=84/12

x=7

f) 2x +1=3

2x=3-1

2x=2

x=2/2

x=1

g) (x+2)9=9x+18

9x+18=9x+18

9x-9x=18-18

x=0

Espero ter ajudado.