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2 years ago

Solve the system for x and y -3x+8y=103 -5x-8y=-255

Mathematics

1 answer:

Romashka-Z-Leto [24]2 years ago

3 0

9514 1404 393

Answer:

(x, y) = (19, 20)

Step-by-step explanation:

The coefficients of y are opposites, so we can add the two equations to eliminate y.

(-3x +8y) +(-5x -8y) = (103) +(-255)

-8x = -152

x = 19 . . . . . . . divide by -8

Substituting into the first equation, we have ...

-3(19) +8y = 103

8y = 160

y = 20

The solution is (x, y) = (19, 20).

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