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2 years ago

How many solutions? y = 5(x – 4) 4x + 12 = -y

Mathematics

1 answer:

kakasveta [241]2 years ago

4 0

Answer:

One solution, x = 8/9

Step-by-step explanation:

One way to solve this is to take one equation and substitute into the other and then solve. So, take y=5(x-4) and put that into the other equation.

4x + 12 = -y

4x + 12 = -(5(x-4)) <--- substitution here

4x + 12 = -5(x-4)

4x + 12 = -5x + 20 <-- simplifying

4x + 5x = 20 - 12

9x = 8

x = 8/9

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2 years ago

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