Question

ME AJUDEM FAZENDO UM GRANDE FAVOR :)  PF :( Associe as colunas conforme as equações equivalentes.
a) x + 2 = 10
( ) 2x – 10 = 30
b) 20x = 400
( ) 4 . (x + 8) = – 68
c) 2x – 6 = 50
( ) 7x = 196
d) 3x = – 75
( ) 6 . (x – 3) = 30

Answer 1

a-)
x + 2 = 10
x = 10 - 2 
x = 8
/////////////////////
2x - 10 = 30
2x = 30 + 10
2x = 40
  x = 40/2
  x = 20
===============
b-)20x = 400
        x = 400/20
        x = 20
///////////////////
4x + 32 = - 68
4x = - 68 - 32
4x = - 100
  x = -100/4
  x = - 25
=====================
c-)
2x - 6 = 50
2x = 50 + 6
2x = 56
  x = 56/2
  x = 28
/////////
7x = 196
  x = 196/7
  x = 28
==============
d-)
3x = - 75
  x = -75/3
  x = - 25
//////////////
6x - 18 = 30
6x = 30 + 18
6x = 48
  x = 48/6
  x = 8

Answer 2

a) x+2=10                                               
    x= 10-2
     x=8

b)20x=400
20x/20=400/20
x=20

 c)2x-6=50
    2x = 50+6
     x=56/2
     x=28

d)3x=-75
   3x/3=-75/3
   x=-25

(b)

2x -10=30
2x=40
x=20

(d)

4 (x + 8) = –68
4x+32=-68
4x=100
x=-25

(c)

7x=196
7x/7=196/7
x=28

(a)

6 (x – 3) = 30
6x-18=30
6x=48
x=48/6
x=8