Help please I think Ik the answer but I’m not sure and I need to get my grade up in my math class so please

The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?

Estimate the product. round the first factor to the nearest whole number, round the second factor to the nearest ten, and then multiply. 3 8/9 × 96

Which of the following is the correct ratio for converting kilograms to grams