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VladimirAG [237]
4 years ago
10

Solve system of equations 3x-3y=9 & 5x+3y=-25

Mathematics
2 answers:
Zanzabum4 years ago
6 0

Answer:

<u>x = -2   and   y = -5</u>

Step-by-step explanation:

Given the system of equation:

3x - 3y = 9      ⇒(1)

5x + 3y = -25  ⇒(2)

From (1)  ⇒ 3x - 9 = 3y  ⇒(3)

Substitute with the value of (3y) from (3) at (2)

5x + (3x - 9) = -25

5x + 3x - 9 = -25    Combine like terms

8x = -25 + 9 = -16

x = -16/8 = -2

Substitute with the value of x at (3)

3y = 3x - 9

3y = 3 * -2 - 9

3y = -6-9

3y = -15

y = -15/3 = -5

<u>∴ x = -2   and   y = -5</u>

sergiy2304 [10]4 years ago
5 0

Answer:

see the attached picture

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