Question

Ola preciso de ajuda para responder esas  eguaçoes  e q a prof passo hj e  q eu n entendi                                                A) 2x=18    B) 2(x+5)=30  C) x+5x=2x-16  D)5x(3)=2x+39 E)4x-x+2x-3(x+2)=20

Answer 1

 A) 2x = 18 ---. x = 18/2 ---> x = 9
 B) 2(x+5)=30 ---(aplica a distributiva)
     2x + 10 = 30 ---> 2x = 30-10 ---> 2x = 20 ---> x = 20/2 ---> x = 10

C) x + 5x = 2x-16
     6x - 2x = -16 --> 4x = -16 --> x = -16/4 ---> x = -4

D) 5x(3) = 2x+39 
     15x - 2x = 39 ---. 13x = 39 ---> x = 39/13 ---> x= 3

E) 4x-x+2x-3(x+2) = 20
    4x-x+2x -3x - 6 = 20
    2x = 20+6---> 2x=26 ---> x = 26/2 ---. x = 13

Answer 2

A)2x=18
x=18/2
x=9

B)2(x+5)=30
2x+10=30
2x=30-10
2x=20
x=20/2
x=10

C) x+5x=2x-16
6x=2x-16
6x-2x=-16
4x=-16
x=-16/4
x=-4

D) 5x(3)=2x+39
15x=2x+39
15x-2x=39
13x=39
x=39/13
x=3


E)4x-x+2x-3(x+2)=20
3x+2x-3x+6=20
2x+6=20
2x=20-6
2x=14
x=14/2
x=7