First pair goes to f(x) = 20x
Next pair goes to f(x) = 10x + 20
Third pair goes to f(x) = 10x + 25
Last pair goes to f(x) = 20x + 10
Since tom has twice as much as peter and peter has half as much as Mary this shows that Tom and Mary have the same amount
Tom=$6
Mary=$6
Peter=$3
0.6431 if not rounded off
0.6432 if rounded off
Hey there!
Explanation:
First, you had to do is add by 13 from both sides of an equation.

Then, simplify or add by the numbers.


Next, you can also divide by 3 from both sides of an equation.

And finally, simplify and divide by the numbers,

*The answer must have a positive sign.*

Hope this helps!
Answer:
AAAAAAA
Step-by-step explanation:
did it on edge