Answer:
Do not have enough time to answer all of them, but I hope the one I answered will help You, and You can solve 11 too
Step-by-step explanation:
10. Now Jane is x years old. 12 years ago she was (x-12) years old. So Anne at that time was (x-12)/5 years old. After 3 years Jane will be (x+3) years old and Ann (x+3)/2. 12 years ago Anne was (x-12)/5 years old and after 3 years she will be (x+3)/2 years old. If we subtract ages` (x+3)/2-(x-12)/5=15(years passed)
solving this` x=37. Now Jane is 37, and Anne 17
8. In given triangle all sides are equal thus (3x-y)=(x+5)=(y+3)
Representing x with y we have x=y-2. Replace x with y-2 =>
3y-6-y=y+3 => Simplifying y=9, hence each side is y+3=12, x is 7
Answer to 8. 12
