Solve the following system:
y = x + 3
3x + y = 19
(7,4)
(-4,7)
(4,7)
(4,-7)

For this case we have the following system of equations:

We solve by the substitution method:

We substitute the first equation in the second equation:

We add similar terms:

We subtract 3 from both sides of the equation:

We divide between 4 on both sides of the equation:

We look for the value of the variable y:

Finally, the solution of the system is:

0.6

39mph

step-by-step explanation:

r and t.

both are 64 degrees.