Mathematics
Statement 1: x = 5 and y = 2 are the solution of equations x - y = 3 and 2x + y = 11.
Statement 2: x = 5 and y = 2 will be the solutions of the given equations if for each equation, the values on left hand side and right hand side are the same.
Both the statements are true.
Both the statements are false.
Statement 1 is true, and statement 2 is false.
Statement 1 is false, and statement 2 is true.
Linear Equations
2 Likes
Answer
Given,
First equation :
⇒ x - y = 3
⇒ x = 3 + y ……..(1)
Second equation :
⇒ 2x + y = 11 ………………….(2)
Substituting the value of x from equation (1) in (2),
⇒ 2(3 + y) + y = 11
⇒ 6 + 2y + y = 11
⇒ 6 + 3y = 11
⇒ 3y = 11 - 6
⇒ 3y = 5
⇒ y =
Substitute the value of y in equation (1),
⇒ x = 3 +
⇒ x =
⇒ x =
Thus, x = and y = are the solution of equations.
So, statement 1 is false.
First equation :
⇒ x - y = 3
Substituting x = 5 and y = 2 in L.H.S. of first equation
⇒ 5 - 2
⇒ 3.
L.H.S. = R.H.S.
Second equation :
⇒ 2x + y = 11
Substituting x = 5 and y = 2 in L.H.S. of second equation
⇒ 2(5) + 2
⇒ 10 + 2
⇒ 12
L.H.S. ≠ R.H.S.
So, statement 2 is false.
∴ Both the statements are false.
Hence, option 2 is the correct option.
Answered By
1 Like
Related Questions
In a two digit number, the sum of the digit is 11 and the tens digit minus unit digit is 5. The number is :
38
83
29
92
Based on the given information, find the height of the glass.
![Based on the given information, find the height of the glass. Simultaneous (Linear) Equations [Including Problems], Concise Mathematics Solutions ICSE Class 9.](https://cdn1.knowledgeboat.com/img/cm9/q1-e-test-yourself-c6-icse-class-9-concise-maths-upd-2027-711x399.png)
16 cm
14 cm
12 cm
10 cm
Statement 1: The sum of two numbers x and y is 11. Twice the first number plus three times the second number equals to 25.
⇒ x + y = 11 and 2x + 3y = 25
Statement 2: The numbers are 7 and 4.
Both the statements are true.
Both the statements are false.
Statement 1 is true, and statement 2 is false.
Statement 1 is false, and statement 2 is true.
Assertion (A): Solutions of equations 3y - 2x = 1 and 3x + 4y = 24 is x = 4 and y = 3.
Reason (R): ∵ 3y - 2x = 3 x 3 - 2 x 4 = 1 and, 3x + 4y = 3 x 4 + 4 x 3 = 24
A is true, but R is false.
A is false, but R is true.
Both A and R are correct, and R is the correct explanation for A.
Both A and R are correct, and R is correct explanation for A.