Answer:
1. 5x
Variable - x
Contant - none
2. 10-(12*x)
Variable - x
Constant - 10 and 12
3. 16+x
Variable - x
Constant - 16
4. 2x+9
Variable - x
Constant - 9
5. 6+(15*x)
Variable - x
constant - 6 and 15
Step-by-step explanation:
The variable is the letter used in the expression that is to be substituted.
The constant is the independent number.