Question

Here is a system of equations: -x + 6y = 9 (x + 6y = -3 Would you rather use subtraction or addition to solve the system? Explain your reasoning.

Answer 1

We are given the following system

-x + 6y = 9

x + 6y = -3

We can use both addition or subtraction to solve this system. With addition, the variable x would be canceled, and we would first find y. With subtraction, the variable y would be canceled, and we would first find x.