Answer:
After simplifying we get (x,y) as (1,3).
Step-by-step explanation:
Given:
,

We need to use elimination method to solve the and simplify the equations.
Solution;
Let
⇒ equation 1
Also Let
⇒ equation 2
Now by solving the equation we get;
first we will Add equation 2 from equation 1 we get;

Now Dividing both side by 5 using division property of equality we get;

Now Substituting the vale of x in equation 1 we get;

subtracting both side by 1 using subtraction property of equality we get;

Now Dividing both side by 7 using division property of equality we get;

Hence we can say that, After simplifying we get (x,y) as (1,3).
Here,
- x+y=1212••••••
- x-y=518••••••
ADDITIONALL,both two equation.
we get that,
- x+y+x-y=1212+518
- 2x=1730
- x=865
so,
- x-y=518
- 865-y=518
- y=860-518
- y=347
Use the formula p=rt. principle equal rate times time.
I hope this helped you out
Answer:
Step-by-step explanation:

It realistically could be any number based on the person but the most likely answer is 40 hours.