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## Substitution

Instructions: Evaluate each expression by substituting in the given values.

1.
If $x=3$, then what is $x + 4$?

2.
If $x=-5$, then what is $10 + x$?

3.
If $x=7$, then what is $x - 8$?

4.
If $x=-6$, then what is $18 - x$?

5.
If $x=2$, then what is $4x$?

6.
If $x=9$, then what is $-8x$?

7.
If x = 7, then what is $35/x$?

8.
If x = 27, then what is $-x/3$?

9.
If $a=3, b=5$, then what is $2a + b$?

10.
If $a=-1, b=-4$, then what is $a-b$?

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