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Question
The solution of the equation x – y = 10 and x + y = 70 is ______.
Options
(40, 30)
(30, 40)
(10, 60)
(50, 20)
MCQ
Fill in the Blanks
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Solution
(40, 30)
Explanation:
x – y = 10
+ x + y = 70
2x = 80
∴ x = `80/2`
= 40
Substituting x = 40 in x + y = 70, we get
40 + y = 70
∴ y = 70 – 40
= 30
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