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Katen [24]
2 years ago
11

X=2y-47x+5y=-66 what is the x- value​

Mathematics
1 answer:
Gwar [14]2 years ago
5 0

Answer:

x = -8

Step-by-step explanation:

x = 2y - 4 --- Equation 1

7x + 5y = -66 --- Equation 2

I will be using the substitution method to solve this.

Substitute x = 2y - 4 into Equation 2:

7x + 5y = -66

7(2y - 4) + 5y = -66

Evaluate.

14y - 28 + 5y = -66

Evaluate like terms.

19y - 28 = -66

Isolate 19y.

19y = -66 + 28

     = -38

Find y.

y = -38 ÷ 19

y = -2 --- Equation 3

Substitute y = -2 into Equation 1:

x = 2y - 4

x = 2(-2) - 4

Evaluate.

x = -4 - 4

x = -8

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1 year ago
The rectangular ground floor of a building has a perimeter of 780 ft. The length is 200 ft more than the width. Find the length
ivolga24 [154]

Answer:

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