3 years ago

7x+9y=-41 and x+3y=1. Solve system of equations

Mathematics

1 answer:

galben [10]3 years ago

7 0

9514 1404 393

Answer:

(x, y) = (-11, 4)

Step-by-step explanation:

You can subtract 3 times the second equation from the first to eliminate y.

(7x +9y) -3(x +3y) = (-41) -3(1)

4x = -44

x = -11

Substituting into the second equation gives ...

-11 +3y = 1

3y = 12

y = 4

The solution is (x, y) = (-11, 4).

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