Answer:
2x + 9 = 21
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1. subtract 9 from both sides
2x = 12
2. divide 12 by 2
x = 6
Step-by-step explanation:
2x+9=21
Step one: 2x=21
-9
2x=12
Step two: x= 12÷2
x= 6
8 and 5
(2^-6)*(2^3)
=2^(-6+3)
=2^-3
=1/(2^3)
=1/8
