You would do
51-5= 46
then you would divide
46/2= 23
so Susan is
23+5=28
Susan is 28 years old and her sister is 23
28+23=51
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Answer: 
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Step-by-step explanation:
- Cross-multiply.
- Divide both sides by 9.
Answer:
You should know how to integrate both sides
Step-by-step explanation:

Answer:
40
Step-by-step explanation:
This is essentially just (4/3), or
. (4/3)*30 = 40, so our answer must be 40. Just to check, taking 75 percent of 40, we indeed get 30!