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प्रश्न
x = 5, y = 2 is a solution of the linear equation ______.
विकल्प
x + 2y = 7
5x + 2y = 7
x + y = 7
5x + y = 7
उत्तर
x = 5, y = 2 is a solution of the linear equation x + y = 7.
Explanation:
a. Take x + 2y,
On putting x = 5 and y = 2, we get
5 + 2(2) = 5 + 4
= 9 ≠ 7
So, (5, 2) is not a solution of x + 2y = 7.
b. Take 5x + 2y,
On putting x = 5 and y = 2, we get
5(5) + 2(2) = 25 + 4
= 29 ≠ 7
So, (5, 2) is not a solution of 5x + 2y = 7.
c. Take x + y,
On putting x = 5 and y = 2, we get
5 + 2 = 7
So, (5, 2) is a solution of x + y = 7.
d. Take 5x + y,
On putting x = 5 and y = 2, we get
5(5) + 2 = 25 + 2
= 27 ≠ 7
So, (5, 2) is not a solution of 5x + y = 7.
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