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If three times the sum of two number is 42 abd five times their difference is 20 find the numbers.

Chapter Equations Grade 10 ​

User Alejandro Echeverri
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2 Answers

19 votes
19 votes

Answer:

One number is 5 and the other number is 9

Explanation:

If three times the sum of two number is 42 abd five times their difference is 20 find-example-1
User Factor Three
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23 votes
23 votes

Answer:

5 and 9

Explanation:

3(x+y) = 42

5(x-y) = 20

3/3 (x+y) = 42/3

5/5 (x-y) = 20/5


x+y = 14

x-y = 4


x-x = 0

y-(-y) = y+y = 2y

14-4 = 10


2y = 10

2/2 y = 10/2

y = 5


x-5 = 4

x = 4 + 5

x = 9

User Phil Moorhouse
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