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giving brainliest and 34 points. PLEASE ANSWER THIS USING A TABLE AND SHOW ALL STEPS PLEASE!

#2 : In three years, Bob will be twice as old as Karen. Two years ago, Bob was three times as old as Karen. How old is Karen now?

#3 :Five years ago, Amy was six years younger than twice Sarah's age. In 4 years, the sum of their ages will be 45 years. How old will amy be in 10 years?

Respuesta :

Answer:

#2 Karen is 7 years old

#3 Amy will be 31 years old in 10 years

Step-by-step explanation:

2#:

  1. b+3=2(k+3)
  2. b-2=3(k-2)
  3. 2b+1=5k
  4. 2b-5k=-1
  5. b-2k=3
  6. 2b-4k=6
  7. 2b-4k-(2b-5k)=6-(-1)
  8. k=7

3#:

  1. a+1=2(s-5)
  2. a+s+8=45
  3. a-2s=-11
  4. a=37-s
  5. 37-3s=-11
  6. -3s=-48
  7. s=16
  8. a=37-16
  9. a=21
  10. 21+10=31

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