3 years ago

Solve y =-2x y = 3x + 5 by using substitution method

Mathematics

1 answer:

PtichkaEL [24]3 years ago

5 0

Answer:

y = -2x

y = 3x + 5

<=> 3x + 5 = -2x

y = -2x

<=> 5x = -5

y = -2x

<=> x = -1

y = -2x

<=> x = -1

y = (-2)(-1) = 2

so (x; y) = (-1; 2)

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