Answer:
x=9
Step-by-step explanation:
lets say the number is x.
x+9=2x
9=2x-x
9=x
x=4
2x+4=12
-4 -4
---------------
2x = 8
---- ---
2 2
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$1.40
First, 8% of $45
45*0.08=3.6
45+3.6=48.6
50-48.6=1.4
