Question : If $4x–7y=3$ and $2x–y=9$, then the value of $(x–y)$ is:
Option 1: 3
Option 2: 4
Option 3: 5
Option 4: 6
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 3
Solution : Given: $4x–7y=3$ and $2x–y=9$. ⇒ $4x=3+7y$ ----------(1) ⇒ $2x=9+y$ -----------(2) Equating equation (1) and (2), we get: ⇒ $3+7y=2(9+y)$ ⇒ $3+7y=18+2y$ ⇒ $5y=15$ ⇒ $y=3$ Putting the value of $y$ in equation (1), ⇒ $4x=3+7×3$ ⇒ $4x=24$ ⇒ $x=6$ So, $(x–y)=6–3$ $(x–y)=3$ Hence, the correct answer is 3.
Candidates can download this ebook to know all about SSC CGL.
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Question : If $2x-5y=5$ and $2x-y=9$, then $(x-y)$ is equal to:
Question : If $4x^{2}=15^{2}–9^{2}$, then the value of $x$ is:
Question : If $xy = -6$ and $x^3+ y^3= 19$ ($x$ and $y$ are integers), then what is the value of $\frac{1}{x^{–1}}+\frac{1}{y^{–1}}$?
Question : If $x+y+z=0$ and $x^2+y^2+z^2=40$, then what is the value of $x y+y z+z x?$
Question : If $2x-6\leq x-3$ and $1+3x<4x+4$, then $x$ can take which of the following values?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile