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

134.6 us dollars

step-by-step explanation:

1 us dollar = 1.33 canadian dollars

so, 150 us dollars = 150 × 1.33 = $199.5.

in canada, the money mitchell spent = 20 canadian dollars.

remaining canadian dollars with him = 199.5 - 20 = 179.5.

after mitchell returned to us, he exchanged the remaining canadian dollars to us dollars.

179.5 canadian dollars = 179.5 × 0.75 = 134.6 us dollars.