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3 years ago

#17 please help me solve this

Mathematics

1 answer:

Leto [7]3 years ago

5 0

Answer:

x = -6; y = 3

Step-by-step explanation:

1. Make Ax + By = C into two equations.

3x + 5y = -3

(1) 5y = -3x - 3

y = -3/5x - 3/5

(2) 3x = -5y - 3

x = -5/3y - 1

2. Insert (1) and (2) into -3x + 2y = 24.

(1) -3x + 2(-3/5x - 3/5) = 24

-3x - 6/5x - 6/5 = 24

-21/5x = 126/5

x = 126/5 * -5/21

x = -6

(2) -3(-5/3y - 1) + 2y = 24

5y + 3 + 2y = 24

7y = 21

y = 3

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