Algebra 1H - Lesson 6.3 & 6.4 Elimination

3x + 4y = 2 and 4x - 4y = 12

3x - 4y = 6 and 5x + 8y = -1

5x - 2y = -15 and 3x + 8y = 37

4x + 3y = -15 and 2x + 5y = 17

5x + 3y = -6 and x + y = -4

x - 2y = 7 and 2x + 5y = -4

3x + 4y = 5 and 2x + 3y = 7

Five times a number minus twice another number equals twenty-two. The sum of the numbers is three. Let the first number = x and the second number = y. Find the numbers.

7x + 4y = 2 and 7x + 2y = 8

x + y = -5 and x - y = -7