Question

a) 2a=a+8 b)5y+14=3y-12 c)2x-4+x=-2+4x d)12+17t=13t+8 e)4+3x+12=x-5

Answer 1

a
2a = a + 8
2a - a = 8
a = 8 ***
b
5y + 14 = 3y - 12
5y - 3y = -12 - 14
2y = - 26
y = -26/2 = -13 ****
c
2x -4 + x = -2 + 4x
3x - 4 - 4x = -2
-x = -2 + 4
-x = 2
x = -2 *****
d
12 + 17t = 13t + 8
17t - 13t = 8 - 12
4t = - 4
t = -4/4 = -1 ****
e
4 + 3x + 12 = x - 5
3x - x = -5 - 4 - 12
2x = -21
x= -21/2 ****

Answer 2

a) 

2a = a + 8

2a - a = 8

a = 8 
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)

5y + 14 = 3y - 12 

5y - 3y = - 12 - 14

2y = - 26

y = - 26/2

y = - 13

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c)

2x - 4 + x = - 2 + 4x 

2x + x - 4 = - 2 + 4x

3x - 4 = - 2 + 4x

- 4 + 2 = 4x - 3x

- 2 = x

x = - 2
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d)
12 + 17t = 13t + 8 

17t - 13t = 8 - 12

4t = - 4

t = - 4/4

t = - 1
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e)
4 + 3x + 12 = x - 5

4 + 12 + 3x = x - 5

16 + 3x = x - 5

3x - x = - 5 - 16

2x = - 21

x = - 21/2