Solve the system of equations using the linear combination method. 7x+2y=29 3x-5y=30

For this case we have a system of two linear equations with two unknowns. whose variables are given by x and y respectively.

To solve the system by the linear combination method we follow the following steps:

1st step:

We multiply the first equation by 5:

2nd step:

We multiply the second equation by 2:

3rd step:

We add the equations:

Thus, we obtain the following:

4th step:

We substitute   in any of the equations:

Thus, the values of the variables areand .

The values are: and .

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6