Answer:
A. $8139.80
B. $8449.80
Step-by-step explanation:
Kindly check picture attached for explanation
Answer:
6x-10
Step-by-step explanation:
see image below
Answer:
x = 1, y = 2
Step-by-step explanation:
In the elimination method to solve a system of linear equations, one of the two equations is added/subtracted to the other, in order to eliminate one variable from the equation.
In this problem, we have the following two equations:

To solve the system, first we multiply by 2 both sides of the second equation, and we get:

So now the system is

Now we add the two equations, and we get:

So, we get

Now we can substitute this value of y into the eq.(2), and we get:

Step-by-step explanation:
because we can also find out the value of x in second equation like this
3x=21
x=21/3
x=7