Question

1)
A) 16x -52 =4x -4
B) 7. (X-6) =21
C) 4.( x+2 ) = x+ 1,1

2)
A)6x+5=2x
B) 3a -2=b+13
C) x-y= 2y
D) 4r= 5-2t+p
E) x+4. (3-x) =2

Answer 1

A)
16x -52 =4x -4
16x -4 x= -4+52
12x=48
x=4


B)
7. (X-6) =21
7x-42=21
7x=21+42
7x=63
x=63/7
x=9

C) 4.( x+2 ) = x+ 1,1
4x+8=x+1,1
4x-x=1,1-8
3x=6,9
x=2,3

2)
A)6x+5=2x
6x-2x=-5
4x=-5
x=5/4

B) 3a -2=b+13     
C) x-y= 2y
D) 4r= 5-2t+p

E) x+4. (3-x) =2
x+12-4x=2
-3x=2-12
-3x=-10
x=10/3

Answer 2

1)
a)
16x - 52 = 4x - 4
16x - 4x = - 4 + 52
12x = 48
x = 48/12
x = 4
===========================
b)
7.(x - 6) = 21
7x - 42 = 21
7x = 21 + 42
7x = 63
x = 63/7
x = 9
=====================
c)
4.(x + 2) = x + 1,1
4x + 8 = x + 1,1
4x - x = 1,1 - 8
3x = - 6,9
x = - 6,9/3
x = - 2,3
=====================
2)
a)

6x + 5 = 2x
6x - 2x = 5
4x = 5
x = 5/4
===================
b)

3a - 2 = b + 13
3a - b = 13 + 2
3a - b = 15
3a - 15 = b
b = 3a - 15

3a - 15 = b
3a = b + 15
a = b + 15
         3
==========================
c)

x - y = 2y
x = 2y + y
x = 3y

3y = x
y = x
      3
=======================
d)
4r = 5 - 2t + p
4r + 2t - p = 5

4r + 2t - 5 = p

p = - 5 + 4r + 2t
=====================
p = - 5 + 4r + 2t

p - 2t + 5 = 4r 
p - 2t + 5 = r
       4

r = p - 2t + 5
             4
----------------------------------------
p = - 5 + 4r + 2t
p + 5 - 4r = 2t 
2t = p + 5 - 4r

t = p + 5 - 4r
           2 
------------------------------------------
e)
x + 4.(3 - x) = 2
x + 12 - 4x = 2
- 4x + x + 12 = 2
- 3x = 2 - 12
- 3x = - 10 ( - 1)
3x = 10
x = 10
       3