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3 years ago

If 5x + 4y= 13 and 4x + 5y = 14, find the value of (x - y).

Mathematics

2 answers:

soldi70 [24.7K]3 years ago

8 0

Answer:

x - y = - 1

Step-by-step explanation:

Given the 2 equations

5x + 4y = 13 → (1)

4x + 5y = 14 → (2)

Subtract (2) from (1) term by term , that is

(5x - 4x) + (4y - 5y) = 13 - 14

x - y = - 1

yarga [219]3 years ago

6 0

Answer:

x = 1

y = 2

x - y = -1

Step-by-step explanation:

5x + 4y= 13, then 4y = 13 - 5x, then y = (13 - 5x)/4

4x + 5y = 14

substitute for y:

4x + 5(13 - 5x)/4 = 14

simplifying:

4x + (65 - 25x)/4 = 14

4x + 16.25 -6.25x = 14

-2.25x = -2.25

x = 1

y = (13 - 5)/4 = 2

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<u><em>Final answer</em></u>:-

The probability that all are male of choosing '3' students

P(E) = 0.067 = 6.71%

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If 5x + 4y= 13 and 4x + 5y = 14, find the value of (x - y).​

If 5x + 4y= 13 and 4x + 5y = 14, find the value of (x - y).