Please please help me!! solve the system of equations by the substitution method.
{ 4x - 5y = 19
{ y = x - 4

select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution is __ (Simplify your answer. Type an ordered pair.)
B. There are infinitely many solutions.
C. There is no solution.

A. The solution is (1, -3)

Step-by-step explanation:

4x - 5y = 19

y = x - 4

Since the second equation already has y isolated, you can just plug that into the first equation:

4x - 5(x - 4) = 19

4x - 5x + 20 = 19

-x = -1

x = 1

Take your x value from the previous equation answer and plug that into the second equation:

y = (1) - 4

y = -3

Final solution:

(1, -3)

If you really want to know if you're correct, just do a LS/RS check for both equations:

4(1) - 5(-3) = 19

19 = 19

LS = RS

-3 = 1 - 4

-3 = -3

LS = RS

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step-by-step explanation:

divided 3/4 and 6

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step-by-step explanation:

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