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3 years ago

2x - 1y = -9 y = - 5 - 5x

Mathematics

1 answer:

WARRIOR [948]3 years ago

4 0

Answer:

x = - 7 and y = 30

Step-by-step explanation:

2x - y = -9

subtract 2x from either side

-y = -9 - 2x

divide either side by -1

y = 9 + 2x

Plug in 9 + 2x for y

9 + 2x = -5 - 5x

Add 5 to either side and subtract 2x from either side

14 = -2x

divide either side by -2

-7 = x

plug in -7 for x in one of the equations

y = -5 - ( 5 x -7 )

y = -5 - ( - 35)

y = -5 + 35

y = 30

plug in x and y

30 = -5 - ( 5 x -7)

30 = -5 - (-35)

30 = -5 + 35

30 = 30

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