Question

23
17. The solution of x + y = 14 and x - y = 4 is
O 9 and 5
O 10 and 4
O O O O
12 and 2
16 and 4​

Answer 1

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monal6

10.02.2018

Math

Secondary School

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Solve using substitution method x+y=14 x-y=4

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Answer:

Step-by-step explanation:

Given :-

x + y = 14 and x - y = 4

Solution :-

⇒ x + y = 14 ... (i)

⇒ x - y = 4 ... (ii)

From equation (i), we get

⇒ x = 14 - y ... (iii)

Putting this value in equation (ii), we get

⇒ (14 - y) - y = 4

⇒ 14 - 2y = 4

⇒ 10 = 2y

⇒ y = 10/2

⇒ y = 5 ... (iv)

Putting this in equation (iii), we get

⇒ x = 9

Hence, x = 9 and y = 5.