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3 years ago

8х + 7y= -5 X= -3y - 7

Mathematics

2 answers:

GrogVix [38]3 years ago

4 0

Answer:

x = 2

y = -3

Step-by-step explanation:

Step 1: Write systems of equation

8x + 7y = -5

x = -3y - 7

Step 2: Solve for y

Substitute 2nd equation into 1st: 8(-3y - 7) + 7y = -5
Distribute 8: -24y - 56 + 7y = -5
Combine like terms: -17y - 56 = -5
Add 56 to both sides: -17y = 51
Divide both sides by -17: y = -3

Step 3: Solve for x

Substitute y to find x: x = -3(-3) - 7
Multiply: x = 9 - 7
Subtract: x = 2

Step 4: Check

Plug in x, y into an original equation to verify it's a solution.

2 = -3(-3) - 7

2 = 9 - 7

2 = 2

Inessa05 [86]3 years ago

4 0

Answer:

x=2 y=-3

Step-by-step explanation:

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