Respuesta :

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Explanation:

For every problem, plug in the number where the variable is.

For example:

Evaluate the following expression by substituting 8 for x.

x + 9

You would take the x and turn it into 8, then you would do 8 + 9.

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Answer:

1)  

a= 17

b= 7

c= 56

d= 4

e= 29

f= 10

g= 18

h= 4

2)

a= -1

b= 2/3

c= -4/3

d= -5/3

e= -2

f= -8/3

g= -14/9

h= -17/9

3)

a= 1/2

b= 5/6

c= 1/6

d= -1/3

e= 1/3

f= 5/12

g= 7/18

h= 0.75

Step-by-step explanation: