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charle [14.2K]
2 years ago
7

If x+y=580 and x=3y then what are x and y?

Mathematics
2 answers:
sergejj [24]2 years ago
7 0

Answer:

x=435 ,y=145

Step-by-step explanation:

You substitute x for 3y in this equation and get

3y+y=580

from here you simplify

4y=580

and divide 580 by 4 to get what y is

y=580/4

y=145

now since x=3y you mutiply y by 3

x=3(y)

x=3(145)

x=435

hjlf2 years ago
4 0

Answer:

x = 435

y = 145

Step-by-step explanation:

The key to this problem is that x = 3y. So put that into

x + y = 580                     Substitute 3y for x

3y + y = 580                   Combine like terms

4y = 580                         Divide by 4

4y / 4 = 580 / 4              Do the division

y = 145

x + y = 580                     Substitute the value for y

x + 145 = 580                 Subtract  145 from both sides

x = 580 - 145                  Combine

x = 435

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17) AB = 26

18) ∠1 and ∠2 are supplementary angles.

19) ∠1 and ∠2 are vertical angles.

20) x = 7

21) 10.125° = ∠GEF

22) x = 14

23) x = 25

<h3>How to find congruent angles?</h3>

17) AC is congruent to CE.

DE = 7x - 1

BC = 9x - 2

CE = 10x + 18

DE + DE = CE

2DE = CE

2(7x - 1) = 10x+18

14x-2 = 10x+18

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x = 20/4

x = 5

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CD = 3x + 19

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AB = x + 18 + 2

AB = x + 20

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AB = 5 + 21

AB = 26

18) ∠1 and ∠2 are supplementary angles.

19) ∠1 and ∠2 are  vertical angles.

20) ∠TUV = ∠TUW + ∠WUV

7x - 9 + 5x - 11 = 9x + 1

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3x = 21

x = 21/3

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21) Let ∠DEG = x. Thus;

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x = 14

23) 5x + 4 = 8x - 71

3x = 75

x = 25

Read more about Congruent Angles at; brainly.com/question/1675117

#SPJ1

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