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In a class of 70 students and 25 teachers, each student got gifts that were 20% of total number of students and each teacher got gifts that were 10% of ...
if 2x +3y =7 and 2x+2 -3y+2 =7, then find the value of x and y.
If, 3x + y = 14, and 2xy = 32, and 3x > y, then find the value of 27x³ – y³.
A sum of Rs. 25,000 is invested in SIP 'G' which offers 7% p.a. simple interest for 7 years. The interest received from SIP 'G' is invested in SIP 'H' w...

If a 2 + b 2 + c 2 = 40 & ab + bc + ca = 12 then a + b+ c = ?
Solve the inequality for real x:
3 − 2x ≤ (x + 1)/2 < 5
If p = 36 - q - r and pq + r(q + p) = 310, then find the value of (p² + q² + r²).
- If x + 4y = 26 and 4x + y = 41, then find the value of (x - y).
A company’s expenditure on three departments over four years is as follows (in thousands):