What is the solution of the system of equations?

y = 3x + 7
y = x – 9

hope you understand this my special keyboard accomodation is bugging out

Step-by-step explanation:

We can substitute

y

=

x

−9

in the first equation to get the value of

x

We get

x

−

9

=

3

x

+

7

Transposing

3

x

to the left hand side and

−

9

to the right hand side, we get

x

−

3

x

=

7

+

9

−

2

x

=

16

Dividing both sides by

−

2

, we get

−

2

x

−

2

=

16

−

2

x

=

−

8

Substituting

x

=

−

8

in the second equation, we get

y

=

−

8

−

9

y

=

−

17

answer: she must produce at least 9,000 windows in order to make a profit of $48,000

explanation:

48,000 - 12,000 = 36,000

36,000/4 = 9,000