जब किसी संख्या के 7 गुने में से 15 घटाया जाता है, तो प्राप्त परिणाम उस संख्या के दुगुने से 10 अधिक होता है। वह संख्या ज्ञात कीजिए।

Find the number of solutions for the pair of linear equations: 5x − 7y + 28 = 0 and 10x + 14y − 28 = 0.

If 2p3 - 57 = 3, then the value of p is:

The cost of 2 sarees and 4 shirts is Rs. 1600. With the same amount of money, one can buy 1 saree and 6 shirts. If someone wants to buy 12 shirts, how much amount does he/she have to pay?