Question
A shopkeeper marked an article Rs. 640 above its cost
price and sold it after giving a discount of 25% and earned a profit of 35%. Find the cost price of the articleSolution
Let cost price of the article is Rs. 100x So, 1.35 × 100x = 0.75 × (100x + 640) Or, 135x = 75x + 480 Or, 60x = 480 Or, x = 8 Cost price of the article = 100 × 8 = Rs. 800
The lines x + y = 9 and x - y = 3 intersect at point P. Find the coordinates of P.
Solve: 2x + 3y = 19 and x − y = 2, Find x and y
Solve for x: 5x − 7 = 3x + 9
For given pair of equations, how many solutions are possible?
4x + 6y = 16 and 8x + 12y = 32
If 2x + 3y = 27 and 3x - y = 13, find (x + y).
For given pair of equations, how many solutions are possible?
5x − 2y = 12 and 10x − 4y = 24
The equations 6x + my + 18 = 0 and 9x + 21y + 27 = 0 have a unique solution. Which of the following statements is definitely true?
Solve: (x/3) + (x/5) = 16
For given pair of equations, how many solutions are possible?
2x + 3y = 10 and 4x + 5y = 18
I. p2 – 5p + 6 = 0                 Â
II. 36q2 = 81
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