Three times the first of two numbers decreased by the second equals 9. Twice the first number increased by the second number equals 11. Find the two numbers. I've already sorted out the equations, I just don't get how to get my answers [substitution or addition method]

3x - y = 9
2x + y = 11

if I'm wrong w the written equation please tell me ='>

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

Evaluate the expression. (9 + 5)(3 + 2)0

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212