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03-12-2020
Mathematics

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can you tell me how to solve this problem using substitution step by step?

y = -2x - 9 and 6x - 5y = - 19

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Аноним Аноним

03-12-2020

Answer:

x = -4

Step-by-step explanation:

The first equation tells us what y is equal to. We then substitute wherever there is a y with what y equals.

y = -2x - 9

6x - 5y = -19

6x - 5(-2x-9) = -19

6x + 10x + 45 = -19

16x + 45 = -19

16x = -64

x = -4

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