Solving more complex simultaneous equations by elimination

12 questions

1. Which equation is true for x = 3 and y = -2?
2. If I add together the pair of simultaneous equations 4x + ay = 12 and 5x - ay = 26, what is the resulting equation?
3. Which equation is true for x = \frac{1}{2} and y = 2?
4. If I add together the pair of simultaneous equations x + y = 28 and x - y = 12, what is the resulting equation?
5. Which equation is true for x = -5 and y = -2?
6. If I add together the pair of simultaneous equations 2x - 3y = 30 and y -2x = 6, what is the resulting equation?
7. Which multiplier would match the y coefficients for equations 1) 15x + 4y = 12 and 2) 2x + 2y = 6:
8. Which multiplier would match the x coefficients for equations 1) 3x + 5y = 21 and 2) x + 2y = 8:
9. Which multiplier would match coefficients for either x or y for equations 1) 5x + 4y = -13 and 2) 10x + 2y = -44:
10. What is the value of y for simultaneous equations x + 4y = 7 and 2x + 3y = -1
11. What is the value of y for simultaneous equations 3x + 4y = 10 and 2x + 2y = 4
12. What is the value of x for simultaneous equations 3x + 3y = 21 and 2x + y = 9

License: OGL