Answer:
13
Step-by-step explanation:
Set Susan's present age as x, her age from 3 years ago as x-3, and her age in three years as 2(x-3)
Since her age in seven years = 2 times as old as she way 3 years ago, set up the equation:
x+7 = 2(x-3)
x+7 = 2x-6
x = 13
Answer: 15
Step-by-step explanation:
Answer: 2x and x2 are the same
Step-by-step explanation:
The answer is B. -a+4+5a-a-6
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