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3 years ago

I need to know dis answer

Mathematics

1 answer:

worty [1.4K]3 years ago

7 0

Answer:

(-8,4)

Step-by-step explanation:

System of Equations:

Solve the following system of equations by the substitution method:

5x - 6y = -64 [1]

y = 20 + 2x [2]

Substituting y from [2] in [1]:

5x - 6(20 + 2x) = -64

Operating:

5x - 120 - 12x = -64

Simplifying:

-7x - 120 = -64

Adding 120:

-7x = -64 + 120 = 56

x = 56/(-7) = -8

x = -8

From [2]:

y = 20 + 2(-8) = 4

Solution (-8,4)

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